{"title":"Wisualarm","description":null,"products":[{"product_id":"wisualarm-carbon-monoxide-alarm-10-year-sealed-battery-lcd-display","title":"Wisualarm Carbon Monoxide Alarm | 10-Year Sealed Battery | LCD Display","description":"\u003c!--\n  SUGGESTED PRODUCT TITLE (SEO):\n  Wisualarm DHI-HY-GC20D Carbon Monoxide Alarm | 10-Year Sealed Battery | LCD Display | EN 50291-1:2018 | TÜV \u0026 CE Certified\n  MPN: DHI-HY-GC20D\n  Brand: Wisualarm (by Dahua)\n  Category: Fire \u0026 Safety \u003e Carbon Monoxide Alarms \u003e Standalone CO Alarms\n  Note: This is the STANDALONE (non-wireless) variant. For the wireless interconnected version compatible with the Wisulink RF mesh system, see DHI-HY-GC20D-R8.\n  UK Importer: Dahua Technology UK Ltd., 3rd Floor, Quantum House, 60 Norden Road, Maidenhead, SL6 4AY\n--\u003e\n\u003cstyle\u003e\n  .wu-desc * { box-sizing: border-box; }\n  .wu-desc { font-family: inherit; color: inherit; line-height: 1.7; font-size: 16px; }\n  .wu-desc p, .wu-desc li, .wu-desc td, .wu-desc th { font-size: 16px !important; line-height: 1.7; }\n  .wu-desc h2 { font-size: 22px !important; font-weight: 700; color: #1a1a2e; border-bottom: 2px solid #c0392b; padding-bottom: 6px; margin: 2rem 0 1rem; line-height: 1.3; }\n  .wu-desc h3 { font-size: 17px !important; font-weight: 700; color: #1a1a2e; margin: 1.2rem 0 0.4rem; line-height: 1.4; }\n  .wu-desc p { margin: 0 0 1rem; }\n  .wu-desc ul { padding-left: 1.5rem; margin: 0 0 1rem; }\n  .wu-desc ul li { margin-bottom: 0.5rem; }\n\n  .wu-intro-box { background: #fef5f5; border-left: 4px solid #c0392b; padding: 1.1rem 1.4rem; 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gap: 0.85rem; margin-bottom: 1.2rem; }\n  .wu-card { background: #fef5f5; border: 1px solid #f5c0c0; border-radius: 6px; padding: 1rem 1.1rem; line-height: 1.6; }\n  .wu-card strong { display: block; color: #1a1a2e; margin-bottom: 0.35rem; font-size: 16px !important; }\n\n  .wu-reg-box { background: #fff8e6; border: 1px solid #f0d080; border-radius: 6px; padding: 1rem 1.3rem; margin: 1.2rem 0; color: #5a4a00; }\n  .wu-reg-box p { margin: 0 0 0.5rem !important; }\n  .wu-reg-box p:last-child { margin: 0 !important; }\n\n  .wu-safety-box { background: #fef5f5; border: 2px solid #c0392b; border-radius: 6px; padding: 1rem 1.3rem; margin: 1.2rem 0; }\n  .wu-safety-box p { margin: 0 !important; color: #7a1a1a; }\n\n  .wu-variant-table { width: 100%; border-collapse: collapse; margin-bottom: 1.2rem; }\n  .wu-variant-table th { background: #1a1a2e; color: #fff !important; padding: 0.65rem 0.9rem; font-size: 14px !important; text-align: left; }\n  .wu-variant-table td { padding: 0.55rem 0.9rem; border-bottom: 1px solid #e8d8d8; font-size: 14px !important; vertical-align: top; }\n  .wu-variant-table tr:nth-child(even) td { background: #fef5f5; }\n  .wu-variant-table td:first-child { font-weight: 600; color: #111; width: 25%; }\n  .wu-variant-table .col-highlight td:first-child { color: #c0392b !important; font-weight: 700; }\n\n  .wu-spec-table { width: 100%; border-collapse: collapse; margin-bottom: 1.5rem; }\n  .wu-spec-table th { background: #1a1a2e; color: #fff !important; text-align: left; padding: 0.7rem 1rem; font-weight: 700; font-size: 16px !important; }\n  .wu-spec-table td { padding: 0.6rem 1rem; border-bottom: 1px solid #e8d8d8; vertical-align: top; font-size: 16px !important; }\n  .wu-spec-table tr:nth-child(even) td { background: #fef5f5; }\n  .wu-spec-table td:first-child { font-weight: 600; color: #111; width: 44%; }\n  .wu-spec-table .section-head td { background: #c0392b !important; color: #fff !important; font-weight: 700 !important; font-size: 14px !important; text-transform: uppercase; letter-spacing: 0.05em; }\n\n  .wu-install-steps { counter-reset: install-step; list-style: none !important; padding: 0 !important; margin: 0 0 1rem !important; }\n  .wu-install-steps li { counter-increment: install-step; padding: 0.6rem 0.8rem 0.6rem 3rem !important; position: relative; border-bottom: 1px solid #e8d8d8; font-size: 15px !important; margin: 0 !important; }\n  .wu-install-steps li::before { content: counter(install-step); position: absolute; left: 0.7rem; top: 50%; transform: translateY(-50%); background: #c0392b; color: #fff; width: 22px; height: 22px; border-radius: 50%; font-size: 13px !important; font-weight: 700; display: flex; align-items: center; justify-content: center; line-height: 1; }\n  .wu-install-steps li:last-child { border-bottom: none; }\n\n  .wu-faq-item { border-bottom: 1px solid #e8d8d8; padding: 1rem 0; }\n  .wu-faq-item:last-child { border-bottom: none; }\n  .wu-faq-item p { margin: 0.4rem 0 0 !important; }\n\n  .wu-infobox { background: #fef5f5; border: 1px solid #f5c0c0; border-radius: 6px; padding: 1rem 1.2rem; margin-top: 1.5rem; font-size: 16px !important; line-height: 1.6; }\n\n  @media (max-width: 600px) {\n    .wu-grid { grid-template-columns: 1fr 1fr; }\n    .wu-stat-bar { justify-content: center; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"wu-desc\"\u003e\n\u003cdiv class=\"wu-intro-box\"\u003e\n\u003cp\u003e\u003cspan class=\"wu-badge\"\u003eStandalone\u003c\/span\u003e \u003cspan class=\"wu-badge dark\"\u003e10-Year Sealed Battery\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin-top: 0.75rem !important;\"\u003eThe \u003cstrong\u003eWisualarm \u003c\/strong\u003eDHI-HY-GC20D is a standalone carbon monoxide alarm with a \u003cstrong\u003e10-year sealed 3V CR123A lithium battery\u003c\/strong\u003e — designed to provide a full decade of continuous protection with zero battery maintenance. It uses a high-performance \u003cstrong\u003eFigaro electrochemical CO sensor\u003c\/strong\u003e, recognised as one of the most reliable and accurate sensor technologies for domestic CO detection, and is certified to \u003cstrong\u003eEN 50291-1:2018\u003c\/strong\u003e — the current British and European standard for residential CO alarms. An integrated LCD display shows live CO concentration in ppm, combined with a \u0026gt;85dB audible alarm and visual LED indicator, gives occupants clear real-time information when it matters most. A single-button test and silence function makes routine testing and false-alarm management simple.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat-bar\"\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003e10yr\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eSealed Battery Life\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003e85dB+\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eAlarm Volume @ 3m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003eLCD\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eLive CO Display (ppm)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003e~45s\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eSilence Duration\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003eEN 50291\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003e-1:2018 Certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003e125g\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eWeight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-reg-box\"\u003e\n\u003cp\u003e🏠 \u003cstrong\u003eUK Legal Requirement — Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022:\u003c\/strong\u003e Since 1 October 2022, private sector landlords in England are legally required to install a CO alarm in any room with a fixed combustion appliance (excluding gas cookers). This includes rooms with gas boilers, gas fires, oil boilers, solid fuel stoves and open fireplaces. Social landlords have been subject to the same requirement since 1 February 2023. The DHI-HY-GC20D, certified to EN 50291-1:2018, meets the technical standard required to comply with this legislation. Similar requirements apply in Scotland, Wales and Northern Ireland under their respective regulations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cdiv class=\"wu-grid\"\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e🔬 Figaro Electrochemical CO Sensor\u003c\/strong\u003eThe Figaro electrochemical sensor is a precision CO detection technology that measures CO concentration through a controlled electrochemical reaction. It delivers high sensitivity, excellent selectivity (low cross-sensitivity to hydrogen and other gases that trigger false alarms in cheaper catalyst-bead sensors), fast response to rising CO levels, and a stable, calibrated performance maintained over the full 10-year sensor life.\u003c\/div\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e📺 LCD Display — Live CO Reading in ppm\u003c\/strong\u003eThe integrated LCD screen shows the current carbon monoxide concentration in parts per million (ppm) in real time. This is particularly valuable to emergency responders and service engineers: rather than just knowing the alarm has triggered, they can see the actual concentration level — helping to determine the severity of a leak and whether evacuation or ventilation is sufficient. The display also shows a peak-level CO memory, recording the highest concentration detected.\u003c\/div\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e🔋 10-Year Sealed Battery — Zero Maintenance\u003c\/strong\u003eA non-replaceable 3V CR123A lithium battery powers the alarm for its entire 10-year service life. The sealed design eliminates the most common cause of CO alarm failure: occupants removing or not replacing flat batteries. At end of life, the unit emits an end-of-life warning and the entire alarm is replaced — ensuring the sensor and battery are always within their service window. Ideal for rental properties where battery maintenance cannot be guaranteed.\u003c\/div\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e🔊 \u0026gt;85dB Audible + Visual Alarm\u003c\/strong\u003eThe alarm sounder exceeds 85dB(A) measured at 3 metres, meeting the EN 50291 audible output requirement. A visual LED indicator provides an additional alarm signal — important for occupants with hearing impairment and for confirming alarm status from a distance. The combined audio\/visual indication continues until the alarm is silenced or the CO level drops below the threshold.\u003c\/div\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e🔕 Test and Silence — Single Button\u003c\/strong\u003eOne button handles both routine self-testing (press to trigger the test cycle, confirming sensor, sounder and battery are functional) and temporary silencing during a nuisance alarm event — typically caused by brief peaks from cooking near the unit. The ~45-second silence duration prevents extended disturbance while keeping the alarm active to detect genuine CO build-up. Silencing does not disable the alarm permanently.\u003c\/div\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e📍 Standalone — No Wiring, No Hub Required\u003c\/strong\u003eThe DHI-HY-GC20D operates entirely independently — no mains wiring, no Wi-Fi, no gateway, no subscription, no app. It is ready to use straight from the box with a simple wall-mount installation. This makes it the right choice wherever a simple, reliable, code-compliant CO alarm is needed without any infrastructure requirements. For wireless interconnected coverage across a whole property, see the DHI-HY-GC20D-R8 variant.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWhere to Install\u003c\/h2\u003e\n\u003cp\u003eCO alarms should be installed wherever a combustion appliance is present and wherever occupants sleep. The following guidance is based on BS EN 50292 (the installation standard that accompanies EN 50291) and HSE recommendations:\u003c\/p\u003e\n\u003cul class=\"wu-install-steps\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eEvery room with a fixed combustion appliance\u003c\/strong\u003e — gas or oil boiler, gas fire, wood-burning stove, open fireplace, log burner, or pellet stove. The alarm should be on the same level as the appliance, within 1–3 metres where possible.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEach sleeping level of the home\u003c\/strong\u003e — CO is particularly dangerous at night when occupants cannot self-evacuate. An alarm in or adjacent to sleeping areas provides the earliest possible warning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting height\u003c\/strong\u003e — CO has a similar density to air and disperses evenly. EN 50292 recommends mounting on a wall or ceiling. Wall mounting: between 1.5m and 2.1m above the floor. Ceiling mounting: as per manufacturer instructions (minimum 300mm from walls\/corners).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvoid\u003c\/strong\u003e — direct sunlight, areas of high humidity (bathrooms, directly above cookers), areas with strong airflow (directly next to windows, fans or air conditioning vents), and garages or enclosed parking areas (vehicle exhaust will trigger the alarm).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eStandalone vs Wireless Interconnected — Which Variant?\u003c\/h2\u003e\n\u003ctable class=\"wu-variant-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eDHI-HY-GC20D ★ (this product)\u003cbr\u003e\u003csmall\u003eStandalone\u003c\/small\u003e\n\u003c\/th\u003e\n\u003cth\u003eDHI-HY-GC20D-R8\u003cbr\u003e\u003csmall\u003eWireless Interconnected\u003c\/small\u003e\n\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWireless interconnection\u003c\/td\u003e\n\u003ctd\u003e✗ No\u003c\/td\u003e\n\u003ctd\u003e✓ Yes — up to 24 Wisulink devices\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp \/ smart home integration\u003c\/td\u003e\n\u003ctd\u003e✗ No\u003c\/td\u003e\n\u003ctd\u003e✓ Optional — via DHI-HY-GW01A Gateway\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery\u003c\/td\u003e\n\u003ctd\u003e10-year sealed CR123A (non-replaceable)\u003c\/td\u003e\n\u003ctd\u003e10-year sealed CR123A (non-replaceable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLCD CO display\u003c\/td\u003e\n\u003ctd\u003e✓ Yes\u003c\/td\u003e\n\u003ctd\u003e✓ Yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm volume\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;85dB @ 3m\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;85dB @ 3m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEN 50291-1:2018 certified\u003c\/td\u003e\n\u003ctd\u003e✓ Yes\u003c\/td\u003e\n\u003ctd\u003e✓ Yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e-10°C to +40°C\u003c\/td\u003e\n\u003ctd\u003e-10°C to +55°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eSingle-room compliance, simple installs, rental properties, cost-effective standalone protection\u003c\/td\u003e\n\u003ctd\u003eMulti-room or whole-home coverage, properties where alarm in one room should sound all alarms, smart monitoring via app\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"wu-safety-box\"\u003e\n\u003cp\u003e⚠️ \u003cstrong\u003eCarbon monoxide — know the symptoms:\u003c\/strong\u003e CO is colourless and odourless — it cannot be detected by the senses alone. Symptoms of CO poisoning include headache, dizziness, nausea, breathlessness and confusion. If your CO alarm sounds: \u003cstrong\u003edo not ignore it\u003c\/strong\u003e. Open windows and doors, evacuate immediately, do not re-enter until declared safe by the emergency services or gas-safe engineer. Call the Gas Emergency number: \u003cstrong\u003e0800 111 999\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"wu-spec-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eProduct Identity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel number\u003c\/td\u003e\n\u003ctd\u003eDHI-HY-GC20D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eWisualarm (by Dahua)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVariant\u003c\/td\u003e\n\u003ctd\u003eStandalone (non-wireless)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eDetection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor type\u003c\/td\u003e\n\u003ctd\u003eElectrochemical (Figaro)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGas detected\u003c\/td\u003e\n\u003ctd\u003eCarbon monoxide (CO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor life\u003c\/td\u003e\n\u003ctd\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eAlarm Output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm volume\u003c\/td\u003e\n\u003ctd\u003eOver 85dB(A) at 3 metres\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm mode\u003c\/td\u003e\n\u003ctd\u003eVisual (LED) and audible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSilence function\u003c\/td\u003e\n\u003ctd\u003eSupported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSilence duration\u003c\/td\u003e\n\u003ctd\u003eApproximately 45 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay\u003c\/td\u003e\n\u003ctd\u003eLCD — live CO concentration (ppm) and peak-level memory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003ePower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower source\u003c\/td\u003e\n\u003ctd\u003e3V CR123A lithium battery (non-replaceable, sealed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery life\u003c\/td\u003e\n\u003ctd\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow battery warning\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnd-of-life warning\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eEnvironmental\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsage environment\u003c\/td\u003e\n\u003ctd\u003eIndoor use only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating temperature\u003c\/td\u003e\n\u003ctd\u003e-10°C to +40°C (+14°F to +104°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative humidity\u003c\/td\u003e\n\u003ctd\u003e≤95% RH (non-condensing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003ePhysical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (L × W × H)\u003c\/td\u003e\n\u003ctd\u003e116.4 × 71.7 × 28.3mm (4.58\" × 2.82\" × 1.11\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e125g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing material\u003c\/td\u003e\n\u003ctd\u003ePC + ABS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation method\u003c\/td\u003e\n\u003ctd\u003eWall mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eCertifications \u0026amp; Standards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard compliance\u003c\/td\u003e\n\u003ctd\u003eEN 50291-1:2018\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eTÜV, CE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWireless interconnection\u003c\/td\u003e\n\u003ctd\u003eNot supported (standalone only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFAQs\u003c\/h2\u003e\n\u003cdiv class=\"wu-faq-item\"\u003e\n\u003ch3\u003eDoes this alarm comply with the Smoke and Carbon Monoxide Alarm Regulations 2022?\u003c\/h3\u003e\n\u003cp\u003eYes. The DHI-HY-GC20D is certified to EN 50291-1:2018, which is the standard specified in the statutory guidance accompanying the Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022 (England). It meets the technical requirements for a compliant CO alarm for private and social rented properties. The regulations require CO alarms in rooms with fixed combustion appliances (excluding gas cookers); this alarm is appropriate for those locations when used as a standalone unit. For properties requiring interconnected alarms across multiple rooms (e.g. to meet Scottish regulations under the Housing (Scotland) Act 2006), the wireless DHI-HY-GC20D-R8 variant should be considered.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-faq-item\"\u003e\n\u003ch3\u003eCan the battery be replaced when it runs low?\u003c\/h3\u003e\n\u003cp\u003eNo — the battery is permanently sealed within the unit and is not designed to be replaced. This is a deliberate safety feature: the sealed design ensures the alarm cannot be inadvertently disabled by battery removal, and the 10-year service life is matched to the sensor's operational lifespan. When the end-of-life warning sounds (typically after 10 years), the entire unit should be replaced. This is consistent with BS EN 50291 guidance on CO alarm replacement intervals.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-faq-item\"\u003e\n\u003ch3\u003eWhat is the difference between this and the DHI-HY-GC20D-R8?\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eDHI-HY-GC20D\u003c\/strong\u003e (this product) is a standalone alarm — it operates independently, with no wireless connectivity to other alarms. It is the simpler, lower-cost option for single-room CO protection or for properties where interconnection is not required. The \u003cstrong\u003eDHI-HY-GC20D-R8\u003c\/strong\u003e adds Wisulink RF wireless interconnection, allowing it to communicate with up to 24 other Wisualarm devices (smoke alarms, heat alarms, CO alarms) — when one triggers, all sound simultaneously. It can also be connected to the optional Wisualarm Gateway (DHI-HY-GW01A) for smartphone app alerts. Both share the same Figaro electrochemical sensor, LCD display and 10-year sealed battery.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-faq-item\"\u003e\n\u003ch3\u003eMy alarm is beeping briefly every minute — is this an emergency?\u003c\/h3\u003e\n\u003cp\u003eA single brief beep every 30–60 seconds typically indicates either a low battery warning or an end-of-life signal — not a CO alarm event. A CO alarm triggers a continuous or rapid pattern of beeps. Refer to the user manual for the specific beep pattern meanings for this model. If the rapid alarm pattern sounds, treat it as a CO emergency, evacuate, and call the gas emergency line (0800 111 999) — do not assume it is a false alarm without investigation by a qualified engineer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Wisualarm","offers":[{"title":"Default Title","offer_id":63582067130717,"sku":"DHI-HY-GC20D","price":19.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/WisuAlarmCOMonoxideAlarmDHI-HY-GC20D.png?v=1771922374"},{"product_id":"wisualarm-wireless-carbon-monoxide-alarm-10-year-sealed-battery-lcd-co-temp-humidity-display","title":"Wisualarm Wireless Carbon Monoxide Alarm | 10-Year Sealed Battery | LCD CO + Temp + Humidity Display","description":"\u003cstyle\u003e\n  .wu-desc * { box-sizing: border-box; }\n  .wu-desc { font-family: inherit; color: inherit; line-height: 1.7; font-size: 16px; }\n  .wu-desc p, .wu-desc li, .wu-desc td, .wu-desc th { font-size: 16px !important; line-height: 1.7; }\n  .wu-desc h2 { font-size: 22px !important; font-weight: 700; color: #1a1a2e; border-bottom: 2px solid #c0392b; padding-bottom: 6px; margin: 2rem 0 1rem; line-height: 1.3; }\n  .wu-desc h3 { font-size: 17px !important; font-weight: 700; color: #1a1a2e; margin: 1.2rem 0 0.4rem; line-height: 1.4; }\n  .wu-desc p { margin: 0 0 1rem; }\n  .wu-desc ul { padding-left: 1.5rem; margin: 0 0 1rem; }\n  .wu-desc ul li { margin-bottom: 0.5rem; }\n\n  .wu-intro-box { background: #fef5f5; border-left: 4px solid #c0392b; padding: 1.1rem 1.4rem; border-radius: 0 6px 6px 0; margin-bottom: 1.5rem; }\n  .wu-intro-box p { margin: 0 !important; }\n\n  .wu-badge { display: inline-block; background: #c0392b; color: #fff; font-size: 13px !important; font-weight: 700; border-radius: 4px; padding: 2px 10px; margin-right: 6px; margin-bottom: 4px; vertical-align: middle; }\n  .wu-badge.dark { background: #1a1a2e; }\n  .wu-badge.grey { background: #555; }\n  .wu-badge.green { background: #1a7a3c; 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color: #5a4a00; }\n  .wu-reg-box p { margin: 0 0 0.5rem !important; }\n  .wu-reg-box p:last-child { margin: 0 !important; }\n\n  .wu-safety-box { background: #fef5f5; border: 2px solid #c0392b; border-radius: 6px; padding: 1rem 1.3rem; margin: 1.2rem 0; }\n  .wu-safety-box p { margin: 0 !important; color: #7a1a1a; }\n\n  .wu-lcd-box { background: #eaf4fb; border: 1px solid #85c1e9; border-radius: 8px; padding: 1.1rem 1.4rem; margin: 1.2rem 0; }\n  .wu-lcd-box p { margin: 0 0 0.5rem !important; }\n  .wu-lcd-box p:last-child { margin: 0 !important; }\n\n  .wu-variant-table { width: 100%; border-collapse: collapse; margin-bottom: 1.2rem; }\n  .wu-variant-table th { background: #1a1a2e; color: #fff !important; padding: 0.65rem 0.9rem; font-size: 14px !important; text-align: left; }\n  .wu-variant-table td { padding: 0.55rem 0.9rem; border-bottom: 1px solid #e8d8d8; font-size: 14px !important; vertical-align: top; }\n  .wu-variant-table tr:nth-child(even) td { background: #fef5f5; }\n  .wu-variant-table td:first-child { font-weight: 600; 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}\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"wu-desc\"\u003e\n\u003cdiv class=\"wu-intro-box\"\u003e\n\u003cp\u003e\u003cspan class=\"wu-badge\"\u003eWireless Interconnected\u003c\/span\u003e \u003cspan class=\"wu-badge dark\"\u003e10-Year Sealed Battery\u003c\/span\u003e \u003cspan class=\"wu-badge teal\"\u003eCO + Temp + Humidity LCD\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin-top: 0.75rem !important;\"\u003eThe \u003cstrong\u003eWisualarm DHI-HY-GC30A-R8\u003c\/strong\u003e is a wireless interconnected carbon monoxide alarm with a 10-year sealed lithium battery and a multi-function LCD display that shows \u003cstrong\u003elive CO concentration, ambient temperature and relative humidity\u003c\/strong\u003e — making it the most information-rich CO alarm in the Wisualarm battery-powered range. Like the GC20D-R8, it uses a high-performance electrochemical CO sensor and communicates wirelessly at 868 MHz with up to 24 other WisuLink-compatible devices, so triggering any alarm in the network sounds all of them simultaneously. The added temperature and humidity display makes it a genuinely useful everyday device, not just a passive safety tool waiting in the background, while the sealed battery eliminates 10 years of battery maintenance and the risk of occupant tampering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat-bar\"\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003e3-in-1\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eCO + Temp + Humidity\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003e10yr\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eSealed Battery Life\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003e24\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eMax Linked Devices\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003e868MHz\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eWisuLink RF\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003e85dB+\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eAlarm @ 3m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003eEN 50291\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003e-1:2018 Certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-lcd-box\"\u003e\n\u003cp\u003e💡 \u003cstrong\u003eWhat the LCD displays:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIn standby (normal operation):\u003c\/strong\u003e The screen alternates between showing the current ambient \u003cstrong\u003etemperature\u003c\/strong\u003e and \u003cstrong\u003erelative humidity\u003c\/strong\u003e — giving occupants a useful at-a-glance environmental readout without any additional sensor hardware.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDuring a CO alarm event:\u003c\/strong\u003e The display switches to show the live \u003cstrong\u003eCO concentration in parts per million (ppm)\u003c\/strong\u003e, enabling occupants and emergency responders to assess the severity of the exposure in real time rather than just knowing the alarm has triggered.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePeak CO memory:\u003c\/strong\u003e The alarm records and displays the highest CO concentration detected, which persists after the alarm clears — useful for engineers investigating the cause of an alarm event.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEnd-of-life notification:\u003c\/strong\u003e The display provides a clear notification when the unit is approaching the end of its 10-year service life, ensuring timely replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cdiv class=\"wu-grid\"\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e📡 Wireless Interconnect — Up to 24 Devices\u003c\/strong\u003eCommunicates at 868 MHz with the WisuLink wireless mesh. When the CO alarm triggers, every linked device in the network — smoke alarms, heat alarms and other CO alarms — sounds simultaneously, ensuring that an alarm in one room wakes occupants throughout the property. No wiring between devices is required. The 868 MHz band provides better wall penetration and range than the 2.4 GHz band used by Wi-Fi devices, making it well suited to multi-floor UK properties.\u003c\/div\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e🌡️ Temperature \u0026amp; Humidity Display\u003c\/strong\u003eThe standby LCD display rotates between ambient temperature and relative humidity readings. This distinguishes the GC30A-R8 from the standard GC20D-R8: rather than a screen that sits dark until an alarm event, this unit provides genuinely useful environmental information at a glance — helpful in rooms with boilers, utility spaces, or any area where damp monitoring is useful alongside CO safety.\u003c\/div\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e🔬 Electrochemical CO Sensor — 10-Year Life\u003c\/strong\u003eHigh-performance electrochemical CO sensor delivers accurate, selective detection of carbon monoxide with low cross-sensitivity to other gases. The sensor is rated for 10 years of continuous operation — matched to the battery life so both are replaced simultaneously at end of life. Electrochemical sensing is the gold standard for residential CO detection, recommended by BS EN 50292 for domestic alarms.\u003c\/div\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e🔋 10-Year Sealed CR7450 Lithium Battery\u003c\/strong\u003ePowered by a sealed CR7450 lithium cell — a larger format battery than the CR123A used in the GC20D, providing the additional capacity needed to sustain 868 MHz RF communication over 10 years. The sealed design prevents battery removal and ensures the alarm cannot be unintentionally disabled by occupants. A low battery warning provides advance notice before the end of service life.\u003c\/div\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e🔊 \u0026gt;85dB Audible + Visual LED Alarm\u003c\/strong\u003eThe integrated sounder exceeds 85dB(A) at 3 metres. Three LED status indicators provide at-a-glance confirmation of operational status, alarm state and fault condition — useful for anyone checking the device visually across a room. The alarm sounds continuously from the time CO is detected until it is manually silenced or the CO level drops below the threshold.\u003c\/div\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e📱 Optional App Notifications via Gateway\u003c\/strong\u003eAdding the optional Wisualarm Internet Gateway (DHI-HY-GW01A) to the WisuLink network sends instant push notifications to the free Wisualarm app on your smartphone when any linked alarm triggers — including this CO alarm. Ideal for landlords, parents of young children, or anyone who spends time away from the property and wants remote awareness of alarm events. The Gateway connects to your router by Ethernet or Wi-Fi.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-reg-box\"\u003e\n\u003cp\u003e🏠 \u003cstrong\u003eUK Legal Requirement — Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022:\u003c\/strong\u003e Private sector landlords in England must install a CO alarm in every room with a fixed combustion appliance (excluding gas cookers). Social landlords have been subject to the same requirement since 1 February 2023. The DHI-HY-GC30A-R8, certified to EN 50291-1:2018, meets the technical standard required for compliance. For Scottish properties subject to the Housing (Scotland) Act 2006 requirements — which mandate interlinked alarms — the wireless interconnect capability of this model makes it particularly well suited compared to standalone alternatives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWhere to Install\u003c\/h2\u003e\n\u003cul class=\"wu-install-steps\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eEvery room with a fixed combustion appliance\u003c\/strong\u003e — gas or oil boiler, gas fire, log burner, open fireplace, wood-burning stove or pellet stove. The alarm should be within 1–3 metres of the appliance on the same level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEach sleeping level of the home\u003c\/strong\u003e — CO is most dangerous at night when occupants cannot self-evacuate. An alarm on each sleeping floor, linked wirelessly to units near combustion appliances, maximises the warning time available.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting height\u003c\/strong\u003e — CO disperses approximately evenly in air. EN 50292 recommends wall mounting between 1.5m and 2.1m above the floor, or ceiling mounting per manufacturer instructions (minimum 300mm from walls).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvoid\u003c\/strong\u003e — bathrooms, directly above cookers, near open windows or air vents (dilution reduces sensitivity), areas of direct sunlight, garages or car parks (vehicle exhaust will trigger false alarms).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWisualarm CO Alarm Comparison\u003c\/h2\u003e\n\u003ctable class=\"wu-variant-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eDHI-HY-GC20D\u003cbr\u003e\u003csmall\u003eStandalone\u003c\/small\u003e\n\u003c\/th\u003e\n\u003cth\u003eDHI-HY-GC20D-R8\u003cbr\u003e\u003csmall\u003eWireless Interconnected\u003c\/small\u003e\n\u003c\/th\u003e\n\u003cth\u003eDHI-HY-GC30A-R8 ★\u003cbr\u003e\u003csmall\u003eThis product\u003c\/small\u003e\n\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWireless interconnection\u003c\/td\u003e\n\u003ctd\u003e✗ No\u003c\/td\u003e\n\u003ctd\u003e✓ Up to 24 devices\u003c\/td\u003e\n\u003ctd\u003e✓ Up to 24 devices\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRF frequency\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003ctd\u003e868 MHz\u003c\/td\u003e\n\u003ctd\u003e868 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLCD — CO concentration\u003c\/td\u003e\n\u003ctd\u003e✓ Yes\u003c\/td\u003e\n\u003ctd\u003e✓ Yes\u003c\/td\u003e\n\u003ctd\u003e✓ Yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLCD — Temperature display\u003c\/td\u003e\n\u003ctd\u003e✗ No\u003c\/td\u003e\n\u003ctd\u003e✗ No\u003c\/td\u003e\n\u003ctd\u003e✓ Yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLCD — Humidity display\u003c\/td\u003e\n\u003ctd\u003e✗ No\u003c\/td\u003e\n\u003ctd\u003e✗ No\u003c\/td\u003e\n\u003ctd\u003e✓ Yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery type\u003c\/td\u003e\n\u003ctd\u003eCR123A (sealed)\u003c\/td\u003e\n\u003ctd\u003eCR123A (sealed)\u003c\/td\u003e\n\u003ctd\u003eCR7450 (sealed, larger)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery life\u003c\/td\u003e\n\u003ctd\u003e10 years\u003c\/td\u003e\n\u003ctd\u003e10 years\u003c\/td\u003e\n\u003ctd\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp alerts (with Gateway)\u003c\/td\u003e\n\u003ctd\u003e✗ No\u003c\/td\u003e\n\u003ctd\u003e✓ Optional\u003c\/td\u003e\n\u003ctd\u003e✓ Optional\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEN 50291-1:2018\u003c\/td\u003e\n\u003ctd\u003e✓ Certified\u003c\/td\u003e\n\u003ctd\u003e✓ Certified\u003c\/td\u003e\n\u003ctd\u003e✓ Certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eSingle-room compliance, simple install\u003c\/td\u003e\n\u003ctd\u003eMulti-room coverage, basic interconnect\u003c\/td\u003e\n\u003ctd\u003eMulti-room coverage + environmental monitoring at each alarm location\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"wu-safety-box\"\u003e\n\u003cp\u003e⚠️ \u003cstrong\u003eCarbon monoxide — act immediately if the alarm sounds:\u003c\/strong\u003e CO is colourless and odourless. If your alarm activates: open windows and doors, evacuate the building immediately, do not re-enter until declared safe. Call the Gas Emergency line: \u003cstrong\u003e0800 111 999\u003c\/strong\u003e. Do not assume a CO alarm is a false alarm without investigation by a Gas Safe registered engineer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"wu-spec-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eProduct Identity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel number\u003c\/td\u003e\n\u003ctd\u003eDHI-HY-GC30A-R8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eWisualarm (by Dahua)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVariant\u003c\/td\u003e\n\u003ctd\u003eWireless interconnected (WisuLink)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eDetection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor type\u003c\/td\u003e\n\u003ctd\u003eElectrochemical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGas detected\u003c\/td\u003e\n\u003ctd\u003eCarbon monoxide (CO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor life\u003c\/td\u003e\n\u003ctd\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eDisplay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay type\u003c\/td\u003e\n\u003ctd\u003eLCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandby display\u003c\/td\u003e\n\u003ctd\u003eAmbient temperature and relative humidity (alternating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm display\u003c\/td\u003e\n\u003ctd\u003eLive CO concentration in ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak CO memory\u003c\/td\u003e\n\u003ctd\u003eYes — records highest concentration detected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnd-of-life notification\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eAlarm Output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm volume\u003c\/td\u003e\n\u003ctd\u003eOver 85dB(A) at 3 metres\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm mode\u003c\/td\u003e\n\u003ctd\u003eVisual (3 × LED indicators) and audible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSilence function\u003c\/td\u003e\n\u003ctd\u003eSupported (single button)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow battery warning\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eWireless Communication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication protocol\u003c\/td\u003e\n\u003ctd\u003eWisuLink RF mesh (868 MHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. interconnected devices\u003c\/td\u003e\n\u003ctd\u003e24 (including smoke, heat and CO alarms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp notifications\u003c\/td\u003e\n\u003ctd\u003eOptional — requires DHI-HY-GW01A Gateway\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003ePower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower source\u003c\/td\u003e\n\u003ctd\u003eDC 3V CR7450 lithium battery (non-replaceable, sealed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery life\u003c\/td\u003e\n\u003ctd\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eEnvironmental\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsage environment\u003c\/td\u003e\n\u003ctd\u003eIndoor use only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation method\u003c\/td\u003e\n\u003ctd\u003eWall mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eCertifications \u0026amp; Standards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard compliance\u003c\/td\u003e\n\u003ctd\u003eEN 50291-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eTÜV, CE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFAQs\u003c\/h2\u003e\n\u003cdiv class=\"wu-faq-item\"\u003e\n\u003ch3\u003eWhat is the difference between this and the DHI-HY-GC20D-R8?\u003c\/h3\u003e\n\u003cp\u003eBoth are 10-year sealed battery wireless interconnected CO alarms with LCD displays and EN 50291-1:2018 certification. The \u003cstrong\u003eGC30A-R8\u003c\/strong\u003e (this product) adds \u003cstrong\u003eambient temperature and humidity display\u003c\/strong\u003e in standby mode — the LCD alternates between temp and humidity readings when no CO is detected, rather than remaining off. It also uses a larger CR7450 sealed battery cell (compared to CR123A in the GC20D-R8) to sustain the additional display functionality over the 10-year life. If temperature and humidity monitoring at the alarm location is useful for your application — utility rooms, plant rooms, or properties where damp is a concern alongside CO risk — the GC30A-R8 provides that without any additional sensor hardware. If a standard CO-only wireless interconnected alarm is sufficient, the GC20D-R8 is the more compact option.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-faq-item\"\u003e\n\u003ch3\u003eCan this alarm be used as a standalone unit without interconnecting other devices?\u003c\/h3\u003e\n\u003cp\u003eYes. While the GC30A-R8 is designed to work within a WisuLink wireless mesh, it functions perfectly as a standalone CO alarm in a single-room installation. Wireless interconnection is available but not required — the alarm will detect CO and sound its own sounder regardless of whether other devices are paired. Pairing additional devices is done simply by following the linking procedure in the user manual; no installer tools or app are required for the interconnection itself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-faq-item\"\u003e\n\u003ch3\u003eDoes this alarm comply with the Smoke and Carbon Monoxide Alarm Regulations 2022?\u003c\/h3\u003e\n\u003cp\u003eYes. The DHI-HY-GC30A-R8 is certified to EN 50291-1, the standard specified in the statutory guidance for the Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022 in England. It is suitable for installation in rented properties to satisfy the legal requirement for a CO alarm in rooms with fixed combustion appliances. Its wireless interconnect capability also makes it appropriate for Scottish properties subject to the Housing (Scotland) Act 2006 interlinked alarm requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-faq-item\"\u003e\n\u003ch3\u003eHow do I receive smartphone alerts when the alarm triggers?\u003c\/h3\u003e\n\u003cp\u003eThe GC30A-R8 does not connect directly to Wi-Fi or the internet. Smartphone notifications require the optional \u003cstrong\u003eWisualarm Internet Gateway (DHI-HY-GW01A)\u003c\/strong\u003e, which connects to your router by Ethernet or Wi-Fi and bridges the WisuLink 868 MHz mesh to the internet. Once the Gateway is added to the network, the free Wisualarm app on your smartphone will receive push notifications whenever any linked device — including this CO alarm — triggers. The Gateway is sold separately and is a single purchase covering all linked devices in the network.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-infobox\"\u003e\n\u003cstrong\u003eℹ️ Often purchased with:\u003c\/strong\u003e \u003cstrong\u003eDHI-HY-GW01A\u003c\/strong\u003e — Wisualarm Internet Gateway for smartphone app alerts · \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Wisualarm","offers":[{"title":"Default Title","offer_id":63582142726493,"sku":"DHI-HY-GC30A-R8","price":33.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/F1CarbonMonoxideAlarmDHI-HY-GC30A.webp?v=1771923197"},{"product_id":"wisualarm-wi-fi-ethernet-gateway-wireless-interconnect-bridge-for-wisulink-alarms","title":"Wisualarm Wi-Fi \u0026 Ethernet Gateway | Wireless Interconnect Bridge for WisuLink Alarms","description":"\u003cstyle\u003e\n  .wu-desc * { box-sizing: border-box; }\n  .wu-desc { font-family: inherit; color: inherit; line-height: 1.7; 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}\n  .wu-variant-table tr:nth-child(even) td { background: #fef5f5; }\n  .wu-variant-table td:first-child { font-weight: 600; color: #111; width: 28%; }\n  .wu-variant-table .col-highlight td:first-child { color: #c0392b !important; font-weight: 700; }\n\n  .wu-spec-table { width: 100%; border-collapse: collapse; margin-bottom: 1.5rem; }\n  .wu-spec-table th { background: #1a1a2e; color: #fff !important; text-align: left; padding: 0.7rem 1rem; font-weight: 700; font-size: 16px !important; }\n  .wu-spec-table td { padding: 0.6rem 1rem; border-bottom: 1px solid #e8d8d8; vertical-align: top; font-size: 16px !important; }\n  .wu-spec-table tr:nth-child(even) td { background: #fef5f5; }\n  .wu-spec-table td:first-child { font-weight: 600; color: #111; width: 44%; }\n  .wu-spec-table .section-head td { background: #c0392b !important; color: #fff !important; font-weight: 700 !important; font-size: 14px !important; text-transform: uppercase; letter-spacing: 0.05em; }\n\n  .wu-install-steps { counter-reset: install-step; list-style: none !important; padding: 0 !important; margin: 0 0 1rem !important; }\n  .wu-install-steps li { counter-increment: install-step; padding: 0.6rem 0.8rem 0.6rem 3rem !important; position: relative; border-bottom: 1px solid #e8d8d8; font-size: 15px !important; margin: 0 !important; }\n  .wu-install-steps li::before { content: counter(install-step); position: absolute; left: 0.7rem; top: 50%; transform: translateY(-50%); background: #c0392b; color: #fff; width: 22px; height: 22px; border-radius: 50%; font-size: 13px !important; font-weight: 700; display: flex; align-items: center; justify-content: center; line-height: 1; }\n  .wu-install-steps li:last-child { border-bottom: none; }\n\n  .wu-faq-item { border-bottom: 1px solid #e8d8d8; padding: 1rem 0; }\n  .wu-faq-item:last-child { border-bottom: none; }\n  .wu-faq-item p { margin: 0.4rem 0 0 !important; }\n\n  .wu-infobox { background: #fef5f5; border: 1px solid #f5c0c0; border-radius: 6px; padding: 1rem 1.2rem; margin-top: 1.5rem; font-size: 16px !important; line-height: 1.6; }\n\n  @media (max-width: 600px) {\n    .wu-grid { grid-template-columns: 1fr 1fr; }\n    .wu-stat-bar { justify-content: center; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"wu-desc\"\u003e\n\u003cdiv class=\"wu-intro-box\"\u003e\n\u003cp\u003e\u003cspan class=\"wu-badge\"\u003eWireless Interconnected\u003c\/span\u003e \u003cspan class=\"wu-badge dark\"\u003e10-Year Sealed Battery\u003c\/span\u003e \u003cspan class=\"wu-badge teal\"\u003eCO + Temp + Humidity LCD\u003c\/span\u003e\u003c\/p\u003e\n\u003cp style=\"margin-top: 0.75rem !important;\"\u003eThe \u003cstrong\u003eWisualarm DHI-HY-GC30A-R8\u003c\/strong\u003e is a wireless interconnected carbon monoxide alarm with a 10-year sealed lithium battery and a multi-function LCD display that shows \u003cstrong\u003elive CO concentration, ambient temperature and relative humidity\u003c\/strong\u003e — making it the most information-rich CO alarm in the Wisualarm battery-powered range. Like the GC20D-R8, it uses a high-performance electrochemical CO sensor and communicates wirelessly at 868 MHz with up to 24 other WisuLink-compatible devices, so triggering any alarm in the network sounds all of them simultaneously. The added temperature and humidity display makes it a genuinely useful everyday device, not just a passive safety tool waiting in the background, while the sealed battery eliminates 10 years of battery maintenance and the risk of occupant tampering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat-bar\"\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003e3-in-1\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eCO + Temp + Humidity\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003e10yr\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eSealed Battery Life\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003e24\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eMax Linked Devices\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003e868MHz\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eWisuLink RF\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003e85dB+\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003eAlarm @ 3m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-stat\"\u003e\n\u003cdiv class=\"num\"\u003eEN 50291\u003c\/div\u003e\n\u003cdiv class=\"lbl\"\u003e-1:2018 Certified\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-lcd-box\"\u003e\n\u003cp\u003e💡 \u003cstrong\u003eWhat the LCD displays:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIn standby (normal operation):\u003c\/strong\u003e The screen alternates between showing the current ambient \u003cstrong\u003etemperature\u003c\/strong\u003e and \u003cstrong\u003erelative humidity\u003c\/strong\u003e — giving occupants a useful at-a-glance environmental readout without any additional sensor hardware.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDuring a CO alarm event:\u003c\/strong\u003e The display switches to show the live \u003cstrong\u003eCO concentration in parts per million (ppm)\u003c\/strong\u003e, enabling occupants and emergency responders to assess the severity of the exposure in real time rather than just knowing the alarm has triggered.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePeak CO memory:\u003c\/strong\u003e The alarm records and displays the highest CO concentration detected, which persists after the alarm clears — useful for engineers investigating the cause of an alarm event.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eEnd-of-life notification:\u003c\/strong\u003e The display provides a clear notification when the unit is approaching the end of its 10-year service life, ensuring timely replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cdiv class=\"wu-grid\"\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e📡 Wireless Interconnect — Up to 24 Devices\u003c\/strong\u003eCommunicates at 868 MHz with the WisuLink wireless mesh. When the CO alarm triggers, every linked device in the network — smoke alarms, heat alarms and other CO alarms — sounds simultaneously, ensuring that an alarm in one room wakes occupants throughout the property. No wiring between devices is required. The 868 MHz band provides better wall penetration and range than the 2.4 GHz band used by Wi-Fi devices, making it well suited to multi-floor UK properties.\u003c\/div\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e🌡️ Temperature \u0026amp; Humidity Display\u003c\/strong\u003eThe standby LCD display rotates between ambient temperature and relative humidity readings. This distinguishes the GC30A-R8 from the standard GC20D-R8: rather than a screen that sits dark until an alarm event, this unit provides genuinely useful environmental information at a glance — helpful in rooms with boilers, utility spaces, or any area where damp monitoring is useful alongside CO safety.\u003c\/div\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e🔬 Electrochemical CO Sensor — 10-Year Life\u003c\/strong\u003eHigh-performance electrochemical CO sensor delivers accurate, selective detection of carbon monoxide with low cross-sensitivity to other gases. The sensor is rated for 10 years of continuous operation — matched to the battery life so both are replaced simultaneously at end of life. Electrochemical sensing is the gold standard for residential CO detection, recommended by BS EN 50292 for domestic alarms.\u003c\/div\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e🔋 10-Year Sealed CR7450 Lithium Battery\u003c\/strong\u003ePowered by a sealed CR7450 lithium cell — a larger format battery than the CR123A used in the GC20D, providing the additional capacity needed to sustain 868 MHz RF communication over 10 years. The sealed design prevents battery removal and ensures the alarm cannot be unintentionally disabled by occupants. A low battery warning provides advance notice before the end of service life.\u003c\/div\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e🔊 \u0026gt;85dB Audible + Visual LED Alarm\u003c\/strong\u003eThe integrated sounder exceeds 85dB(A) at 3 metres. Three LED status indicators provide at-a-glance confirmation of operational status, alarm state and fault condition — useful for anyone checking the device visually across a room. The alarm sounds continuously from the time CO is detected until it is manually silenced or the CO level drops below the threshold.\u003c\/div\u003e\n\u003cdiv class=\"wu-card\"\u003e\n\u003cstrong\u003e📱 Optional App Notifications via Gateway\u003c\/strong\u003eAdding the optional Wisualarm Internet Gateway (DHI-HY-GW01A) to the WisuLink network sends instant push notifications to the free Wisualarm app on your smartphone when any linked alarm triggers — including this CO alarm. Ideal for landlords, parents of young children, or anyone who spends time away from the property and wants remote awareness of alarm events. The Gateway connects to your router by Ethernet or Wi-Fi.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-reg-box\"\u003e\n\u003cp\u003e🏠 \u003cstrong\u003eUK Legal Requirement — Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022:\u003c\/strong\u003e Private sector landlords in England must install a CO alarm in every room with a fixed combustion appliance (excluding gas cookers). Social landlords have been subject to the same requirement since 1 February 2023. The DHI-HY-GC30A-R8, certified to EN 50291-1:2018, meets the technical standard required for compliance. For Scottish properties subject to the Housing (Scotland) Act 2006 requirements — which mandate interlinked alarms — the wireless interconnect capability of this model makes it particularly well suited compared to standalone alternatives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWhere to Install\u003c\/h2\u003e\n\u003cul class=\"wu-install-steps\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eEvery room with a fixed combustion appliance\u003c\/strong\u003e — gas or oil boiler, gas fire, log burner, open fireplace, wood-burning stove or pellet stove. The alarm should be within 1–3 metres of the appliance on the same level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEach sleeping level of the home\u003c\/strong\u003e — CO is most dangerous at night when occupants cannot self-evacuate. An alarm on each sleeping floor, linked wirelessly to units near combustion appliances, maximises the warning time available.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting height\u003c\/strong\u003e — CO disperses approximately evenly in air. EN 50292 recommends wall mounting between 1.5m and 2.1m above the floor, or ceiling mounting per manufacturer instructions (minimum 300mm from walls).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvoid\u003c\/strong\u003e — bathrooms, directly above cookers, near open windows or air vents (dilution reduces sensitivity), areas of direct sunlight, garages or car parks (vehicle exhaust will trigger false alarms).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWisualarm CO Alarm Comparison\u003c\/h2\u003e\n\u003ctable class=\"wu-variant-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eDHI-HY-GC20D\u003cbr\u003e\u003csmall\u003eStandalone\u003c\/small\u003e\n\u003c\/th\u003e\n\u003cth\u003eDHI-HY-GC20D-R8\u003cbr\u003e\u003csmall\u003eWireless Interconnected\u003c\/small\u003e\n\u003c\/th\u003e\n\u003cth\u003eDHI-HY-GC30A-R8 ★\u003cbr\u003e\u003csmall\u003eThis product\u003c\/small\u003e\n\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWireless interconnection\u003c\/td\u003e\n\u003ctd\u003e✗ No\u003c\/td\u003e\n\u003ctd\u003e✓ Up to 24 devices\u003c\/td\u003e\n\u003ctd\u003e✓ Up to 24 devices\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRF frequency\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003ctd\u003e868 MHz\u003c\/td\u003e\n\u003ctd\u003e868 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLCD — CO concentration\u003c\/td\u003e\n\u003ctd\u003e✓ Yes\u003c\/td\u003e\n\u003ctd\u003e✓ Yes\u003c\/td\u003e\n\u003ctd\u003e✓ Yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLCD — Temperature display\u003c\/td\u003e\n\u003ctd\u003e✗ No\u003c\/td\u003e\n\u003ctd\u003e✗ No\u003c\/td\u003e\n\u003ctd\u003e✓ Yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLCD — Humidity display\u003c\/td\u003e\n\u003ctd\u003e✗ No\u003c\/td\u003e\n\u003ctd\u003e✗ No\u003c\/td\u003e\n\u003ctd\u003e✓ Yes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery type\u003c\/td\u003e\n\u003ctd\u003eCR123A (sealed)\u003c\/td\u003e\n\u003ctd\u003eCR123A (sealed)\u003c\/td\u003e\n\u003ctd\u003eCR7450 (sealed, larger)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery life\u003c\/td\u003e\n\u003ctd\u003e10 years\u003c\/td\u003e\n\u003ctd\u003e10 years\u003c\/td\u003e\n\u003ctd\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp alerts (with Gateway)\u003c\/td\u003e\n\u003ctd\u003e✗ No\u003c\/td\u003e\n\u003ctd\u003e✓ Optional\u003c\/td\u003e\n\u003ctd\u003e✓ Optional\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEN 50291-1:2018\u003c\/td\u003e\n\u003ctd\u003e✓ Certified\u003c\/td\u003e\n\u003ctd\u003e✓ Certified\u003c\/td\u003e\n\u003ctd\u003e✓ Certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBest for\u003c\/td\u003e\n\u003ctd\u003eSingle-room compliance, simple install\u003c\/td\u003e\n\u003ctd\u003eMulti-room coverage, basic interconnect\u003c\/td\u003e\n\u003ctd\u003eMulti-room coverage + environmental monitoring at each alarm location\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"wu-safety-box\"\u003e\n\u003cp\u003e⚠️ \u003cstrong\u003eCarbon monoxide — act immediately if the alarm sounds:\u003c\/strong\u003e CO is colourless and odourless. If your alarm activates: open windows and doors, evacuate the building immediately, do not re-enter until declared safe. Call the Gas Emergency line: \u003cstrong\u003e0800 111 999\u003c\/strong\u003e. Do not assume a CO alarm is a false alarm without investigation by a Gas Safe registered engineer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"wu-spec-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eProduct Identity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel number\u003c\/td\u003e\n\u003ctd\u003eDHI-HY-GC30A-R8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eWisualarm (by Dahua)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVariant\u003c\/td\u003e\n\u003ctd\u003eWireless interconnected (WisuLink)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eDetection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor type\u003c\/td\u003e\n\u003ctd\u003eElectrochemical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGas detected\u003c\/td\u003e\n\u003ctd\u003eCarbon monoxide (CO)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor life\u003c\/td\u003e\n\u003ctd\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eDisplay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDisplay type\u003c\/td\u003e\n\u003ctd\u003eLCD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandby display\u003c\/td\u003e\n\u003ctd\u003eAmbient temperature and relative humidity (alternating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm display\u003c\/td\u003e\n\u003ctd\u003eLive CO concentration in ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak CO memory\u003c\/td\u003e\n\u003ctd\u003eYes — records highest concentration detected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnd-of-life notification\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eAlarm Output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm volume\u003c\/td\u003e\n\u003ctd\u003eOver 85dB(A) at 3 metres\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm mode\u003c\/td\u003e\n\u003ctd\u003eVisual (3 × LED indicators) and audible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSilence function\u003c\/td\u003e\n\u003ctd\u003eSupported (single button)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow battery warning\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eWireless Communication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication protocol\u003c\/td\u003e\n\u003ctd\u003eWisuLink RF mesh (868 MHz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax. interconnected devices\u003c\/td\u003e\n\u003ctd\u003e24 (including smoke, heat and CO alarms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp notifications\u003c\/td\u003e\n\u003ctd\u003eOptional — requires DHI-HY-GW01A Gateway\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003ePower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower source\u003c\/td\u003e\n\u003ctd\u003eDC 3V CR7450 lithium battery (non-replaceable, sealed)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery life\u003c\/td\u003e\n\u003ctd\u003e10 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eEnvironmental\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsage environment\u003c\/td\u003e\n\u003ctd\u003eIndoor use only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation method\u003c\/td\u003e\n\u003ctd\u003eWall mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"section-head\"\u003e\n\u003ctd colspan=\"2\"\u003eCertifications \u0026amp; Standards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard compliance\u003c\/td\u003e\n\u003ctd\u003eEN 50291-1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eTÜV, CE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eFAQs\u003c\/h2\u003e\n\u003cdiv class=\"wu-faq-item\"\u003e\n\u003ch3\u003eWhat is the difference between this and the DHI-HY-GC20D-R8?\u003c\/h3\u003e\n\u003cp\u003eBoth are 10-year sealed battery wireless interconnected CO alarms with LCD displays and EN 50291-1:2018 certification. The \u003cstrong\u003eGC30A-R8\u003c\/strong\u003e (this product) adds \u003cstrong\u003eambient temperature and humidity display\u003c\/strong\u003e in standby mode — the LCD alternates between temp and humidity readings when no CO is detected, rather than remaining off. It also uses a larger CR7450 sealed battery cell (compared to CR123A in the GC20D-R8) to sustain the additional display functionality over the 10-year life. If temperature and humidity monitoring at the alarm location is useful for your application — utility rooms, plant rooms, or properties where damp is a concern alongside CO risk — the GC30A-R8 provides that without any additional sensor hardware. If a standard CO-only wireless interconnected alarm is sufficient, the GC20D-R8 is the more compact option.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-faq-item\"\u003e\n\u003ch3\u003eCan this alarm be used as a standalone unit without interconnecting other devices?\u003c\/h3\u003e\n\u003cp\u003eYes. While the GC30A-R8 is designed to work within a WisuLink wireless mesh, it functions perfectly as a standalone CO alarm in a single-room installation. Wireless interconnection is available but not required — the alarm will detect CO and sound its own sounder regardless of whether other devices are paired. Pairing additional devices is done simply by following the linking procedure in the user manual; no installer tools or app are required for the interconnection itself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-faq-item\"\u003e\n\u003ch3\u003eDoes this alarm comply with the Smoke and Carbon Monoxide Alarm Regulations 2022?\u003c\/h3\u003e\n\u003cp\u003eYes. The DHI-HY-GC30A-R8 is certified to EN 50291-1, the standard specified in the statutory guidance for the Smoke and Carbon Monoxide Alarm (Amendment) Regulations 2022 in England. It is suitable for installation in rented properties to satisfy the legal requirement for a CO alarm in rooms with fixed combustion appliances. Its wireless interconnect capability also makes it appropriate for Scottish properties subject to the Housing (Scotland) Act 2006 interlinked alarm requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-faq-item\"\u003e\n\u003ch3\u003eHow do I receive smartphone alerts when the alarm triggers?\u003c\/h3\u003e\n\u003cp\u003eThe GC30A-R8 does not connect directly to Wi-Fi or the internet. Smartphone notifications require the optional \u003cstrong\u003eWisualarm Internet Gateway (DHI-HY-GW01A)\u003c\/strong\u003e, which connects to your router by Ethernet or Wi-Fi and bridges the WisuLink 868 MHz mesh to the internet. Once the Gateway is added to the network, the free Wisualarm app on your smartphone will receive push notifications whenever any linked device — including this CO alarm — triggers. The Gateway is sold separately and is a single purchase covering all linked devices in the network.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wu-infobox\"\u003e\n\u003cstrong\u003eℹ️ Often purchased with:\u003c\/strong\u003e \u003cstrong\u003eDHI-HY-GW01A\u003c\/strong\u003e — Wisualarm Internet Gateway for smartphone app alerts · \u003c\/div\u003e\n\u003c\/div\u003e","brand":"Wisualarm","offers":[{"title":"Default Title","offer_id":63582255776093,"sku":"DHI-HY-GW01A","price":99.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/WisuAlarmHY-GW01AAlarmWi-FiandEthernetGateway.webp?v=1771923431"},{"product_id":"wisualarm-mains-powered-heat-alarm-grade-d2-class-a1-54-65-c-9v-battery-backup-wired-interconnect","title":"Wisualarm Mains Powered Heat Alarm | Grade D2 | Class A1 54–65°C | 9V Battery Backup | Wired Interconnect","description":"\u003c!-- SEO Product Name: Wisualarm Mains Heat Alarm 54-65C | DHI-HY-HT5MB | Replaceable 9V Backup --\u003e\n\u003cdiv style=\"font-size:16px; max-width:900px; margin:0 auto; color:#2B2B2B; line-height:1.6; font-family:Arial, Helvetica, sans-serif;\"\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eThe \u003cstrong\u003eWisualarm DHI-HY-HT5MB\u003c\/strong\u003e is a mains-powered Class A1 fixed-temperature heat alarm certified to \u003cstrong\u003eBS 5446-2:2003\u003c\/strong\u003e, designed for rooms where a smoke alarm would cause persistent false activations — principally kitchens, garages, utility rooms and loft spaces. It draws its primary power from a permanent 230V mains connection and includes a \u003cstrong\u003ereplaceable 9V alkaline battery\u003c\/strong\u003e as standby backup, classifying it as a \u003cstrong\u003eGrade D2 device under BS 5839-6\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eA high-precision \u003cstrong\u003ethermistor\u003c\/strong\u003e triggers the alarm when the ambient temperature reaches \u003cstrong\u003e54°C–65°C\u003c\/strong\u003e, and the 85dB sounder runs continuously until reset. The unit interconnects by wire with up to \u003cstrong\u003e24 other Wisualarm mains-powered smoke and heat alarms\u003c\/strong\u003e, and can optionally join the \u003cstrong\u003eWisuLink wireless mesh\u003c\/strong\u003e by adding the DHI-HY-MRF50-R8 wireless module — enabling a hybrid system that links wired and wireless devices across a property.\u003c\/p\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:20px 0 24px 0;\"\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e54-65°C\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eAlarm Trigger Range\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e85dB\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eAlarm Volume @ 3m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e9V\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eReplaceable Battery\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e24\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eMax Interconnected Units\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eGrade D2\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eBS 5839-6 Classification\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eBS 5446-2\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eCompliance Standard\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#E6F4F3; border-left:4px solid #008377CF; border-radius:6px; padding:14px 18px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size:14px; font-weight:700; color:#008377CF; text-transform:uppercase; letter-spacing:.04em; margin-bottom:6px;\"\u003eGrade D2 — Familiar Replaceable Battery\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eThe HT5MB's \u003cstrong\u003ereplaceable 9V alkaline standby battery\u003c\/strong\u003e classifies it as a \u003cstrong\u003eGrade D2 device under BS 5839-6\u003c\/strong\u003e. This is widely specified in rental properties and retrofit installations, where a familiar, low-cost 9V battery is straightforward for landlords or occupants to source and replace as part of routine maintenance.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FFF6E5; border-left:4px solid #E0942A; border-radius:6px; padding:14px 18px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size:14px; font-weight:700; color:#E0942A; text-transform:uppercase; letter-spacing:.04em; margin-bottom:6px;\"\u003eHeat Alarms, Not Smoke Alarms, for These Rooms\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eHeat alarms respond to a rise in ambient temperature rather than smoke particles, so they resist the false alarms that cooking fumes, steam and dust can trigger in a photoelectric smoke alarm. Fit heat alarms — not smoke alarms — in kitchens, garages and similar spaces, and always follow the room-by-room guidance in BS 5839-6 or your project specification.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FFF6E5; border-left:4px solid #E0942A; border-radius:6px; padding:14px 18px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size:14px; font-weight:700; color:#E0942A; text-transform:uppercase; letter-spacing:.04em; margin-bottom:6px;\"\u003eAnnual Battery Check Recommended\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eWith a typical \u003cstrong\u003ebattery life of around 1 year\u003c\/strong\u003e, the standby 9V alkaline cell should be checked and replaced as part of an annual maintenance visit, alongside the alarm's own test and silence function, to keep the unit operating correctly during a mains power interruption.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:0 0 24px 0;\"\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eReplaceable 9V Standby Battery\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA standard \u003cstrong\u003e9V alkaline battery\u003c\/strong\u003e provides backup power during mains interruptions and can be replaced by any competent person without specialist tools.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eHigh-Precision Thermistor Sensor\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA \u003cstrong\u003ethermistor-based heat sensor\u003c\/strong\u003e samples the surrounding air every 10 seconds and triggers at 54°C–65°C, avoiding the false alarms smoke detection can suffer from steam or cooking fumes.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eHardwired Interconnect, 24 Units\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eConnects to up to \u003cstrong\u003e24 other mains-powered Wisualarm smoke and heat alarms\u003c\/strong\u003e over standard interconnect wiring, so one triggered alarm sounds every linked unit in the property.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eOptional Wireless Expansion\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eAdding the \u003cstrong\u003eDHI-HY-MRF50-R8\u003c\/strong\u003e module lets this alarm also communicate over the 868MHz WisuLink wireless mesh, bridging wired and wireless zones in the same system.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eIR Remote Test \u0026amp; Silence\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eSupports \u003cstrong\u003etest and 9-minute silence functions via any working infrared remote control\u003c\/strong\u003e, letting installers and occupants manage the alarm from floor level rather than a ceiling-mounted button.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eThree-LED Status Reporting\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA \u003cstrong\u003etri-colour LED indicator\u003c\/strong\u003e reports standby, alarm and fault conditions at a glance, so a technician or occupant can read the alarm's state without opening the unit.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; overflow:hidden; margin:0 0 24px 0;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eProduct Identity\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eModel number\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eDHI-HY-HT5MB\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eBrand\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eWisualarm (by Dahua)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eBS 5839-6 Grade\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eGrade D2\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eDetection\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSensor type\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eThermistor\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eDetection class\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eClass A1 — fixed temperature\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm temperature range\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e+54°C to +65°C (+129°F to +149°F)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSampling period\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e10 s\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003ePower\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003ePrimary supply\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eAC 100V–250V, 50\/60Hz (mains)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eStandby battery\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eReplaceable 9V alkaline battery\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eBattery life\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eApprox. 1 year\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eAlarm Output\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm volume\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e≥85dB(A) at 3 metres\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm mode\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eVisual and audible, continuous until reset\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSilencing\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eYes — 9 minutes, including via IR remote\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eIndicators\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eStandby\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eGreen LED remains lit\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eRed LED flashes once per second\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSensor fault\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eYellow LED flashes twice per minute\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eLow battery backup fault\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eYellow LED flashes once per minute\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eInterconnection\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eWired interconnect\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eUp to 24 hardwire interconnected units\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eWireless interconnect\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eUp to 24 units via optional DHI-HY-MRF50-R8 WisuLink module\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003ePhysical \u0026amp; Environmental\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eDimensions\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eØ148.6mm × H68.4mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eWeight\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e310 g\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eColour \/ casing\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eWhite, PC+ABS\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eInstallation\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eCeiling mount\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eOperating environment\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eIndoor\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eOperating temperature\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e-10°C to +55°C\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eOperating humidity\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e≤95% RH, non-condensing\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eCertification\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eCertifications\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eCE, UKCA, RCM, PSTI, BSI, Activfire\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eCompliance standard\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eBS 5446-2:2003, AS 1603.3:2018\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eShould I fit a heat alarm or a smoke alarm in my kitchen?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eA \u003cstrong\u003eheat alarm\u003c\/strong\u003e such as the HT5MB is the correct choice for kitchens, since cooking fumes and steam routinely trigger false alarms on smoke detectors. Always check the room-by-room detector guidance in BS 5839-6 or your project's fire strategy for the specific grade and category required.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eHow often does the backup battery need replacing?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eThe 9V alkaline standby battery has a typical life of around \u003cstrong\u003e1 year\u003c\/strong\u003e and should be checked and replaced as part of routine annual maintenance, so backup power remains available during any mains interruption.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eHow many alarms can be linked together?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eUp to \u003cstrong\u003e24 Wisualarm mains-powered smoke and heat alarms\u003c\/strong\u003e can be hardwired together on the interconnect line, so that any single alarm triggering sounds every linked unit in the property.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eCan this alarm work with wireless Wisualarm devices?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eYes, if fitted with the optional \u003cstrong\u003eDHI-HY-MRF50-R8 wireless interconnect module\u003c\/strong\u003e, which lets the HT5MB join the 868MHz WisuLink mesh alongside battery-powered wireless alarms.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eWhat's the difference between the HT5MA and HT5MB?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eBoth are mains-powered Class A1 heat alarms with the same 54°C–65°C trigger range and 24-unit interconnect. The HT5MA uses a \u003cstrong\u003esealed 10-year rechargeable lithium battery\u003c\/strong\u003e (Grade D1), while the HT5MB uses a \u003cstrong\u003ereplaceable 9V alkaline battery\u003c\/strong\u003e (Grade D2).\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Wisualarm","offers":[{"title":"Default Title","offer_id":63582299717981,"sku":"DHI-HY-HT5MB","price":27.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/wisualarm-hy-ht5mb-mains-powered-heat-alarm.webp?v=1771923819"},{"product_id":"wisualarm-mains-heat-alarm-54-65c-dhi-hy-ht5ma-10-yr-lithium-backup","title":"Wisualarm Mains Heat Alarm Grade D1 | DHI-HY-HT5MA | 10-Yr Lithium Backup","description":"\u003c!-- SEO Product Name: Wisualarm Mains Heat Alarm 54-65C | DHI-HY-HT5MA | 10-Yr Lithium Backup --\u003e\n\u003cdiv style=\"font-size:16px; max-width:900px; margin:0 auto; color:#2B2B2B; line-height:1.6; font-family:Arial, Helvetica, sans-serif;\"\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eThe \u003cstrong\u003eWisualarm DHI-HY-HT5MA\u003c\/strong\u003e is a mains-powered Class A1 fixed-temperature heat alarm certified to \u003cstrong\u003eBS 5446-2:2003\u003c\/strong\u003e, built for rooms where a smoke alarm would cause persistent false activations — principally kitchens, garages, utility rooms and loft spaces. It draws its primary power from a permanent 230V mains connection and backs this up with a \u003cstrong\u003e10-year rechargeable lithium battery\u003c\/strong\u003e, removing the ongoing cost and hassle of replacing a standby battery over the alarm's working life.\u003c\/p\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eA high-precision \u003cstrong\u003ethermistor\u003c\/strong\u003e triggers the alarm when the ambient temperature reaches \u003cstrong\u003e54°C–65°C\u003c\/strong\u003e, sounding an 85dB alert continuously until reset. The unit interconnects by wire with up to \u003cstrong\u003e24 other Wisualarm mains-powered smoke and heat alarms\u003c\/strong\u003e, and can optionally join the \u003cstrong\u003eWisuLink wireless mesh\u003c\/strong\u003e by adding the DHI-HY-MRF50-R8 wireless interconnect module — enabling a hybrid system that links wired and wireless devices across a property.\u003c\/p\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:20px 0 24px 0;\"\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e54-65°C\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eAlarm Trigger Range\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e85dB\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eAlarm Volume @ 3m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e10-Yr\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eLithium Battery Back-up\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e24\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eMax Interconnected Units\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eGrade D1\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eBS 5839-6 Classification\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eBS 5446-2\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eCompliance Standard\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#E6F4F3; border-left:4px solid #008377CF; border-radius:6px; padding:14px 18px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size:14px; font-weight:700; color:#008377CF; text-transform:uppercase; letter-spacing:.04em; margin-bottom:6px;\"\u003eGrade D1 — Sealed Rechargeable Back-up\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eWith its \u003cstrong\u003enon-replaceable 10-year rechargeable lithium battery\u003c\/strong\u003e providing standby power, the HT5MA is classified as a \u003cstrong\u003eGrade D1 device under BS 5839-6\u003c\/strong\u003e. This eliminates the battery-replacement obligation that applies to Grade D2 alarms, making it well suited to new-build and long-term rental properties where minimal maintenance is a priority.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FFF6E5; border-left:4px solid #E0942A; border-radius:6px; padding:14px 18px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size:14px; font-weight:700; color:#E0942A; text-transform:uppercase; letter-spacing:.04em; margin-bottom:6px;\"\u003eHeat Alarms, Not Smoke Alarms, for These Rooms\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eHeat alarms respond to a rise in ambient temperature rather than smoke particles, so they resist the false alarms that cooking fumes, steam and dust can trigger in a photoelectric smoke alarm. Fit heat alarms — not smoke alarms — in kitchens, garages and similar spaces, and always follow the room-by-room guidance in BS 5839-6 or your project specification.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#E6F4F3; border-left:4px solid #008377CF; border-radius:6px; padding:14px 18px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size:14px; font-weight:700; color:#008377CF; text-transform:uppercase; letter-spacing:.04em; margin-bottom:6px;\"\u003eWired by Default, Wireless-Ready\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eThe HT5MA interconnects over its own dedicated wiring with other Wisualarm mains-powered smoke and heat alarms as standard. Fitting the optional \u003cstrong\u003eDHI-HY-MRF50-R8 wireless module\u003c\/strong\u003e lets it also join a \u003cstrong\u003eWisuLink 868MHz\u003c\/strong\u003e wireless network, useful where running new interconnect cable to every room isn't practical during a retrofit.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:0 0 24px 0;\"\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003e10-Year Rechargeable Battery\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA sealed \u003cstrong\u003erechargeable lithium battery\u003c\/strong\u003e provides standby power for the alarm's full 10-year service life, with no battery changes required.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eHigh-Precision Thermistor Sensor\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA \u003cstrong\u003ethermistor-based heat sensor\u003c\/strong\u003e samples the surrounding air every 10 seconds and triggers at 54°C–65°C, avoiding the false alarms smoke detection can suffer from steam or cooking fumes.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eHardwired Interconnect, 24 Units\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eConnects to up to \u003cstrong\u003e24 other mains-powered Wisualarm smoke and heat alarms\u003c\/strong\u003e over standard interconnect wiring, so one triggered alarm sounds every linked unit in the property.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eOptional Wireless Expansion\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eAdding the \u003cstrong\u003eDHI-HY-MRF50-R8\u003c\/strong\u003e module lets this alarm also communicate over the 868MHz WisuLink wireless mesh, bridging wired and wireless zones in the same system.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eIR Remote Test \u0026amp; Silence\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eSupports \u003cstrong\u003etest and 9-minute silence functions via any working infrared remote control\u003c\/strong\u003e, letting installers and occupants manage the alarm from floor level rather than a ceiling-mounted button.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eThree-LED Status Reporting\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA \u003cstrong\u003etri-colour LED indicator\u003c\/strong\u003e reports standby, alarm and fault conditions at a glance, so a technician or occupant can read the alarm's state without opening the unit.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; overflow:hidden; margin:0 0 24px 0;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eProduct Identity\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eModel number\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eDHI-HY-HT5MA\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eBrand\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eWisualarm (by Dahua)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eBS 5839-6 Grade\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eGrade D1\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eDetection\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSensor type\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eThermistor\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eDetection class\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eClass A1 — fixed temperature\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm temperature range\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e+54°C to +65°C (+129°F to +149°F)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSampling period\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e10 s\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003ePower\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003ePrimary supply\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eAC 100V–250V, 50\/60Hz (mains)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eStandby battery\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e10-year rechargeable lithium (sealed, non-replaceable)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eAlarm Output\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm volume\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e≥85dB(A) at 3 metres\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm mode\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eVisual and audible, continuous until reset\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSilencing\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eYes — 9 minutes, including via IR remote\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eIndicators\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eStandby\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eGreen LED remains lit\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eRed LED flashes once per second\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSensor fault\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eYellow LED flashes twice per minute\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eLow battery backup fault\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eYellow LED flashes once per minute\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eInterconnection\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eWired interconnect\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eUp to 24 hardwire interconnected units\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eWireless interconnect\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eUp to 24 units via optional DHI-HY-MRF50-R8 WisuLink module\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003ePhysical \u0026amp; Environmental\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eDimensions\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eØ148.6mm × H68.4mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eWeight\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e310 g\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eColour \/ casing\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eWhite, PC+ABS\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eInstallation\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eCeiling mount\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eOperating environment\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eIndoor\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eOperating temperature\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e-10°C to +55°C\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eOperating humidity\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e≤95% RH, non-condensing\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eCertification\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eCertifications\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eCE, UKCA, RCM, PSTI, BSI, Activfire\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eCompliance standard\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eBS 5446-2:2003, AS 1603.3:2018\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eShould I fit a heat alarm or a smoke alarm in my kitchen?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eA \u003cstrong\u003eheat alarm\u003c\/strong\u003e such as the HT5MA is the correct choice for kitchens, since cooking fumes and steam routinely trigger false alarms on smoke detectors. Always check the room-by-room detector guidance in BS 5839-6 or your project's fire strategy for the specific grade and category required.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eDoes this alarm need its battery replaced?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eNo. The HT5MA uses a \u003cstrong\u003esealed 10-year rechargeable lithium battery\u003c\/strong\u003e that is not user-replaceable and is designed to last the alarm's full service life, provided it remains powered from the mains between any outages.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eHow many alarms can be linked together?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eUp to \u003cstrong\u003e24 Wisualarm mains-powered smoke and heat alarms\u003c\/strong\u003e can be hardwired together on the interconnect line, so that any single alarm triggering sounds every linked unit in the property.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eCan this alarm work with wireless Wisualarm devices?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eYes, if fitted with the optional \u003cstrong\u003eDHI-HY-MRF50-R8 wireless interconnect module\u003c\/strong\u003e, which lets the HT5MA join the 868MHz WisuLink mesh alongside battery-powered wireless alarms.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eWhat does the yellow LED mean?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eA yellow LED \u003cstrong\u003eflashing twice per minute\u003c\/strong\u003e indicates a sensor fault and the unit should be replaced; flashing \u003cstrong\u003eonce per minute\u003c\/strong\u003e indicates a low battery backup fault requiring attention.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Wisualarm","offers":[{"title":"Default Title","offer_id":65884615573853,"sku":"DHI-HY-HT5MA","price":27.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/D1HeatAlarmDHI-HY-HT5MA.png?v=1789050022"},{"product_id":"wisualarm-standalone-smoke-alarm-dhi-hy-sa13a-5-yr-battery","title":"Wisualarm Standalone Smoke Alarm | DHI-HY-SA13A | 5-Yr Battery","description":"\u003c!-- SEO Product Name: Wisualarm Standalone Smoke Alarm | DHI-HY-SA13A | 5-Yr Battery --\u003e\n\u003cdiv style=\"font-size:16px; max-width:900px; margin:0 auto; color:#2B2B2B; line-height:1.6; font-family:Arial, Helvetica, sans-serif;\"\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eThe \u003cstrong\u003eWisualarm DHI-HY-SA13A\u003c\/strong\u003e is a standalone battery-powered smoke alarm designed for residential and office protection. It uses an advanced \u003cstrong\u003ephotoelectric sensing chamber\u003c\/strong\u003e to detect smoke efficiently while reducing the false alarms that can plague cheaper detectors, backed by a high-power buzzer and clear visual and audible alerts.\u003c\/p\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003ePower comes from a \u003cstrong\u003elong-life battery rated for up to 5 years\u003c\/strong\u003e of standby operation, so the unit can be fitted and largely forgotten between routine tests. As a standalone device it works independently of any mains supply or interconnect network, making it a straightforward option for individual rooms, rental properties and retrofit projects where wiring in a mains alarm isn't practical.\u003c\/p\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:20px 0 24px 0;\"\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003ePhotoelectric\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eSensor Type\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e85dB\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eAlarm Volume @ 3m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e5-Yr\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eBattery Life\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eStandalone\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eOperation\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eTÜV \/ CE\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eCertifications\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eLED\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eStatus Indicator\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FFF6E5; border-left:4px solid #E0942A; border-radius:6px; padding:14px 18px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size:14px; font-weight:700; color:#E0942A; text-transform:uppercase; letter-spacing:.04em; margin-bottom:6px;\"\u003eStandalone Unit — No Interconnect\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eThe SA13A operates as an \u003cstrong\u003eindependent, standalone alarm\u003c\/strong\u003e and does not interconnect with other Wisualarm devices, wired or wireless. Where a property needs multiple alarms to sound together, look to the interconnected Wisualarm smoke alarm range instead.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#E6F4F3; border-left:4px solid #008377CF; border-radius:6px; padding:14px 18px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size:14px; font-weight:700; color:#008377CF; text-transform:uppercase; letter-spacing:.04em; margin-bottom:6px;\"\u003eWhy Photoelectric Detection\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003ePhotoelectric smoke sensing responds quickly to the visible, slow-burning smoke typical of smouldering fires — such as those starting in furniture or bedding — while remaining \u003cstrong\u003eless prone to false alarms from cooking steam\u003c\/strong\u003e than ionisation-type detectors, making it a well-suited general-purpose choice for living areas, bedrooms and hallways.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:0 0 24px 0;\"\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003ePhotoelectric Smoke Chamber\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eAdvanced \u003cstrong\u003ephotoelectric sensing technology\u003c\/strong\u003e detects visible smoke particles quickly and accurately, cutting down on nuisance false alarms.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eHigh-Power 85dB Buzzer\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA built-in \u003cstrong\u003ehigh-power buzzer sounds at 85dB(A) from 3 metres\u003c\/strong\u003e, loud enough to wake occupants and alert anyone nearby.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003e5-Year Battery Life\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA \u003cstrong\u003elong-duration battery rated up to 5 years\u003c\/strong\u003e keeps the alarm running through years of standby operation without a battery swap.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eVisual \u0026amp; Audible Alerting\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eCombines \u003cstrong\u003eLED indicators with the audible alarm\u003c\/strong\u003e so status and warnings are clear even in a noisy or brightly lit environment.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eQuick, Simple Installation\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eFits as a straightforward \u003cstrong\u003estandalone ceiling-mounted unit\u003c\/strong\u003e with no wiring or network configuration required, ideal for retrofits and single-room coverage.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eTÜV \u0026amp; CE Certified\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eIndependently tested and certified to \u003cstrong\u003eTÜV and CE\u003c\/strong\u003e standards, giving confidence in the alarm's reliability and safety performance.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; overflow:hidden; margin:0 0 24px 0;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eProduct Identity\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eModel number\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eDHI-HY-SA13A\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eBrand\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eWisualarm (by Dahua)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eOperation\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eStandalone (no interconnect)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eDetection\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSensor type\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003ePhotoelectric\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003ePower\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003ePower source\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eBattery-powered\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eBattery life\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eUp to 5 years\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eAlarm Output\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm volume\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e85dB(A) at 3 metres\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm mode\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eVisual and audible alarm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eInstallation\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eInstallation\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eCeiling mount\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eCertification\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eCertifications\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eTÜV and CE listed\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eDoes this alarm interconnect with other Wisualarm devices?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eNo. The SA13A is a \u003cstrong\u003estandalone unit\u003c\/strong\u003e and does not link to other smoke or heat alarms, wired or wireless. For a linked multi-room system, choose from the interconnected Wisualarm range instead.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eHow long does the battery last?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eThe SA13A is rated for \u003cstrong\u003eup to 5 years\u003c\/strong\u003e of battery life under normal standby conditions, though the alarm should still be tested regularly using its built-in test function.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eWhat type of smoke does this alarm detect best?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eIts \u003cstrong\u003ephotoelectric sensor\u003c\/strong\u003e responds particularly well to the visible, slow-burning smoke typical of smouldering fires, and is generally less prone to false alarms from cooking steam than ionisation-based detectors.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eWhere should this alarm be installed?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eAs a general-purpose standalone smoke alarm, it suits \u003cstrong\u003eliving rooms, bedrooms and hallways\u003c\/strong\u003e. For kitchens, garages and similarly fume- or steam-prone spaces, a heat alarm is the more appropriate choice.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Wisualarm","offers":[{"title":"Default Title","offer_id":65884730720605,"sku":"DHI-HY-SA13A","price":7.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/WisualarmSmokeAlarmDHI-HY-SA13A.jpg?v=1789050979"},{"product_id":"wisualarm-standalone-smoke-alarm-dhi-hy-sa40a-10-yr-sealed-battery","title":"Wisualarm Standalone Smoke Alarm | DHI-HY-SA40A | 10-Yr Sealed Battery","description":"\u003c!-- SEO Product Name: Wisualarm Standalone Smoke Alarm | DHI-HY-SA40A | 10-Yr Sealed Battery --\u003e\n\u003cdiv style=\"font-size:16px; max-width:900px; margin:0 auto; color:#2B2B2B; line-height:1.6; font-family:Arial, Helvetica, sans-serif;\"\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eThe \u003cstrong\u003eWisualarm DHI-HY-SA40A\u003c\/strong\u003e is a standalone photoelectric smoke alarm built around a \u003cstrong\u003esealed, non-replaceable 3V lithium battery rated for a full 10 years\u003c\/strong\u003e — the entire expected service life of the alarm. This removes battery maintenance entirely and eliminates the risk of an alarm being left running on a flat or removed battery, making it a strong fit for rental properties and landlord-managed housing stock.\u003c\/p\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eIts \u003cstrong\u003esplit-spectrum sensor technology\u003c\/strong\u003e is engineered to reduce false alarms from dust and steam while remaining sensitive to genuine smoke events, and a single button handles both testing and silencing, with silencing also available via a \u003cstrong\u003eworking infrared remote controller\u003c\/strong\u003e for units mounted out of easy reach.\u003c\/p\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:20px 0 24px 0;\"\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003ePhotoelectric\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eSensor Type\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e85dB\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eAlarm Volume @ 3m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e10-Yr\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eSealed Battery Life\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e9 min\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eSilence Duration\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eEN 14604\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eCompliance Standard\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eTÜV \/ CE\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eCertifications\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#E6F4F3; border-left:4px solid #008377CF; border-radius:6px; padding:14px 18px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size:14px; font-weight:700; color:#008377CF; text-transform:uppercase; letter-spacing:.04em; margin-bottom:6px;\"\u003e10-Year Sealed Battery, Zero Maintenance\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eThe SA40A's \u003cstrong\u003e3V CR123A lithium battery is sealed and non-replaceable\u003c\/strong\u003e, rated to last the alarm's full \u003cstrong\u003e10-year service life\u003c\/strong\u003e. There's no battery to change, no low-battery chirp to chase down at 3am, and no risk of an occupant removing a failed battery and leaving the alarm disabled.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FFF6E5; border-left:4px solid #E0942A; border-radius:6px; padding:14px 18px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size:14px; font-weight:700; color:#E0942A; text-transform:uppercase; letter-spacing:.04em; margin-bottom:6px;\"\u003eCoverage Guidance\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eFor ceiling heights under 8 metres, each SA40A is rated to protect an area of approximately \u003cstrong\u003e20m²–40m²\u003c\/strong\u003e. Always confirm detector spacing and quantity against BS 5839-6 or your project's fire safety specification rather than coverage area alone.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:0 0 24px 0;\"\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003e10-Year Sealed Lithium Battery\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA \u003cstrong\u003enon-replaceable 3V lithium cell\u003c\/strong\u003e is rated to power the alarm for its entire 10-year working life, with no battery changes ever required.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eSplit-Spectrum Sensor Technology\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eReduces \u003cstrong\u003efalse alarms triggered by dust and steam\u003c\/strong\u003e while maintaining fast, reliable response to genuine smoke conditions.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eOne-Button Test \u0026amp; Silence\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA single button handles both \u003cstrong\u003etesting and silencing\u003c\/strong\u003e, and the alarm can also be silenced using any working \u003cstrong\u003einfrared remote controller\u003c\/strong\u003e for hard-to-reach installations.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eLow Quiescent Current Design\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003e\n\u003cstrong\u003eUltra-low standby current draw\u003c\/strong\u003e (≤15μA average) helps the sealed battery deliver its full rated 10-year lifespan.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eSurface-Mount Circuit Board\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eBuilt on a \u003cstrong\u003esurface-mount device (SMD) circuit board\u003c\/strong\u003e for consistent manufacturing quality and long-term reliability.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eLow Battery Warning\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA clear \u003cstrong\u003elow battery warning signal\u003c\/strong\u003e gives advance notice as the sealed cell approaches end of life, well before it can no longer power the alarm.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; overflow:hidden; margin:0 0 24px 0;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eProduct Identity\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eModel number\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eDHI-HY-SA40A\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eBrand\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eWisualarm (by Dahua)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eOperation\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eStandalone\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eDetection\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSensor type\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003ePhotoelectric, split-spectrum\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSampling period\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e9 s\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm response threshold\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e0.2dB\/m–0.3dB\/m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eCoverage area\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e20m²–40m² (ceiling height under 8m)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003ePower\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003ePower source\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e3V CR123A lithium battery (sealed, non-replaceable)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eBattery life\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e10 years\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eMonitoring current\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e≤15μA (avg.)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm current\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e≤35mA (avg.)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eAlarm Output\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm volume\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e85dB(A) at 3 metres\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm mode\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eVisual and audible alarm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSilencing\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eYes — 9 minutes, including via IR remote\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eIndicators\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eStandby\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eGreen LED flashes once per minute\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eRed LED flashes once per second\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eFault\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eRed LED flashes twice per minute\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003ePhysical \u0026amp; Environmental\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eDimensions\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eØ81.5mm × H51.6mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eWeight\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e110 g\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eColour \/ casing\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eWhite, PC+ABS\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eInstallation\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eCeiling mount\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eOperating environment\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eIndoor\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eOperating temperature\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e-10°C to +55°C\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eOperating humidity\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e≤95% RH, non-condensing\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eCertification\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eCertifications\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eTÜV and CE listed\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eCompliance standard\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eEN 14604:2005+AC:2008\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eCan the battery in this alarm be replaced?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eNo. The SA40A uses a \u003cstrong\u003esealed, non-replaceable 3V lithium battery\u003c\/strong\u003e rated to last the full 10-year service life of the alarm. Once the battery is depleted, the whole unit is replaced.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eHow is the alarm silenced during a false alarm?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003ePress the alarm's \u003cstrong\u003esingle test\/silence button\u003c\/strong\u003e, or use any working \u003cstrong\u003einfrared remote controller\u003c\/strong\u003e pointed at the unit, which silences the alarm for approximately 9 minutes.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eWhat area does one alarm cover?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eWhere the ceiling height is under 8 metres, each SA40A is rated to cover approximately \u003cstrong\u003e20m² to 40m²\u003c\/strong\u003e. Always confirm exact detector layout against the applicable fire safety standard for the property.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eDoes this alarm interconnect with other alarms?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eNo, the DHI-HY-SA40A is a \u003cstrong\u003estandalone unit\u003c\/strong\u003e. For a linked, wirelessly interconnected version, see the HY-SA40A-R8 variant in the Wisualarm range.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eIs this alarm suitable for a rental property?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eYes — its \u003cstrong\u003esealed 10-year battery\u003c\/strong\u003e removes the ongoing battery-replacement burden that affects landlords and letting agents managing multiple properties, reducing routine maintenance callouts.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Wisualarm","offers":[{"title":"Default Title","offer_id":65884817293661,"sku":"DHI-HY-SA40A","price":16.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/WisualarmStandaloneSmokeAlarm_4b2c0eaf-598b-457a-ba2c-bba3f6db89b2.jpg?v=1789051694"},{"product_id":"wisualarm-mains-smoke-alarm-dhi-hy-sa5mb-replaceable-9v-backup","title":"Wisualarm Mains Smoke Alarm | DHI-HY-SA5MB | Replaceable 9V Backup","description":"\u003c!-- SEO Product Name: Wisualarm Mains Smoke Alarm | DHI-HY-SA5MB | Replaceable 9V Backup --\u003e\n\u003cdiv style=\"font-size:16px; max-width:900px; margin:0 auto; color:#2B2B2B; line-height:1.6; font-family:Arial, Helvetica, sans-serif;\"\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eThe \u003cstrong\u003eWisualarm DHI-HY-SA5MB\u003c\/strong\u003e is a mains-powered photoelectric smoke alarm that draws its primary power from a permanent 230V mains connection and includes a \u003cstrong\u003ereplaceable 9V alkaline battery\u003c\/strong\u003e as standby backup. Its photoelectric sensing chamber is suited to general residential rooms — living rooms, bedrooms, hallways and landings — wherever early smoke detection is needed.\u003c\/p\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eThe alarm's \u003cstrong\u003e85dB(A) sounder\u003c\/strong\u003e gives clear audible warning alongside a visual LED indicator, and it interconnects by wire with up to \u003cstrong\u003e24 other Wisualarm mains-powered smoke and heat alarms\u003c\/strong\u003e, so one triggered unit sounds every linked alarm across the property. Test and silence functions are supported via any working infrared remote control, useful for ceiling-mounted units out of easy reach.\u003c\/p\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:20px 0 24px 0;\"\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003ePhotoelectric\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eSensor Type\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e≥85dB\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eAlarm Volume @ 3m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e9V\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eReplaceable Battery\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e24\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eMax Interconnected Units\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eGrade D2\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eBS 5839-6 Classification\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eMains + Backup\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003ePower Supply\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#E6F4F3; border-left:4px solid #008377CF; border-radius:6px; padding:14px 18px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size:14px; font-weight:700; color:#008377CF; text-transform:uppercase; letter-spacing:.04em; margin-bottom:6px;\"\u003eGrade D2 — Familiar Replaceable Battery\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eThe SA5MB's \u003cstrong\u003ereplaceable 9V alkaline standby battery\u003c\/strong\u003e classifies it as a \u003cstrong\u003eGrade D2 device under BS 5839-6\u003c\/strong\u003e. This is widely specified in rental properties and retrofit installations, where a familiar, low-cost 9V battery is straightforward for landlords or occupants to source and replace.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FFF6E5; border-left:4px solid #E0942A; border-radius:6px; padding:14px 18px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size:14px; font-weight:700; color:#E0942A; text-transform:uppercase; letter-spacing:.04em; margin-bottom:6px;\"\u003eAnnual Battery Check Recommended\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eThe standby 9V alkaline battery should be checked and replaced as part of an annual maintenance visit, alongside testing the alarm's own test and silence function, to ensure backup power remains available during any mains interruption.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FFF6E5; border-left:4px solid #E0942A; border-radius:6px; padding:14px 18px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size:14px; font-weight:700; color:#E0942A; text-transform:uppercase; letter-spacing:.04em; margin-bottom:6px;\"\u003ePhotoelectric Smoke Detection — Not for Kitchens\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eThis is a \u003cstrong\u003esmoke alarm\u003c\/strong\u003e, not a heat alarm, so it should not be fitted in kitchens or other rooms prone to cooking fumes and steam, which can trigger false alarms. For those spaces, use a Wisualarm heat alarm such as the HT5MA or HT5MB instead.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:0 0 24px 0;\"\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eReplaceable 9V Standby Battery\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA standard \u003cstrong\u003e9V alkaline battery\u003c\/strong\u003e provides backup power during mains interruptions and can be replaced by any competent person without specialist tools.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003ePhotoelectric Smoke Sensing\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA \u003cstrong\u003ephotoelectric sensing chamber\u003c\/strong\u003e gives fast, reliable detection of visible smoke while resisting many of the nuisance triggers that affect other detection types.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eHardwired Interconnect, 24 Units\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eConnects to up to \u003cstrong\u003e24 other mains-powered Wisualarm smoke and heat alarms\u003c\/strong\u003e over standard interconnect wiring, so one triggered alarm sounds every linked unit in the property.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eIR Remote Test \u0026amp; Silence\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eSupports \u003cstrong\u003etest and 9-minute silence functions via any working infrared remote control\u003c\/strong\u003e, letting installers and occupants manage the alarm from floor level rather than a ceiling-mounted button.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003e85dB Audible Alarm\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA built-in sounder delivers \u003cstrong\u003e≥85dB(A) at 3 metres\u003c\/strong\u003e, loud enough to alert occupants throughout a typical room or hallway.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eClear LED Status Reporting\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA \u003cstrong\u003egreen\/red LED indicator\u003c\/strong\u003e reports standby and alarm conditions at a glance, so status is clear without needing to open the unit.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; overflow:hidden; margin:0 0 24px 0;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eProduct Identity\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eModel number\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eDHI-HY-SA5MB\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eBrand\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eWisualarm (by Dahua)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eBS 5839-6 Grade\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eGrade D2\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eDetection\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSensor type\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003ePhotoelectric\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSampling period\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e10 s\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm response threshold\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e0.2dB\/m–0.3dB\/m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003ePower\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003ePrimary supply\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eAC 100V–250V, 50\/60Hz (mains)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eStandby battery\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eReplaceable 9V alkaline battery\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eAlarm Output\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm volume\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e≥85dB(A) at 3 metres\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm mode\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eVisual and audible alarm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSilencing\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eYes — 9 minutes, including via IR remote\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eIndicators\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eStandby\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eGreen LED remains lit\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eRed LED flashes once per second\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eInterconnection\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eWired interconnect\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eUp to 24 hardwire interconnected units\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eInstallation\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eInstallation\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eCeiling mount\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eHow often does the backup battery need replacing?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eThe 9V alkaline standby battery should be checked and replaced as part of \u003cstrong\u003eroutine annual maintenance\u003c\/strong\u003e, so backup power remains available during any mains interruption.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eHow many alarms can be linked together?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eUp to \u003cstrong\u003e24 Wisualarm mains-powered smoke and heat alarms\u003c\/strong\u003e can be hardwired together on the interconnect line, so that any single alarm triggering sounds every linked unit in the property.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eIs this alarm suitable for a kitchen?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eNo. This is a \u003cstrong\u003ephotoelectric smoke alarm\u003c\/strong\u003e, and cooking fumes and steam can trigger false alarms. Fit a Wisualarm heat alarm, such as the HT5MA or HT5MB, in kitchens and similar spaces instead.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eWhat's the difference between the SA5MA and SA5MB?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eBoth are mains-powered photoelectric smoke alarms with the same 24-unit interconnect capability. The SA5MA uses a \u003cstrong\u003esealed rechargeable lithium battery\u003c\/strong\u003e, while the SA5MB uses a \u003cstrong\u003ereplaceable 9V alkaline battery\u003c\/strong\u003e.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eCan this alarm be silenced from floor level?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eYes, the SA5MB can be tested and silenced using any working \u003cstrong\u003einfrared remote controller\u003c\/strong\u003e, avoiding the need to reach a ceiling-mounted unit directly.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Wisualarm","offers":[{"title":"Default Title","offer_id":65884981985629,"sku":"DHI-HY-SA5MB","price":25.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/WisualarmMainsSmokeAlarm.jpg?v=1789052688"},{"product_id":"wisualarm-standalone-carbon-monoxide-alarm-dhi-hy-gc20a-10-yr-battery","title":"Wisualarm Standalone Carbon Monoxide Alarm | DHI-HY-GC20A | 10-Yr Battery","description":"\u003c!-- SEO Product Name: Wisualarm Standalone Carbon Monoxide Alarm | DHI-HY-GC20B | 10-Yr Battery LCD --\u003e\n\u003cdiv style=\"font-size: 16px; max-width: 900px; margin: 0 auto; color: #2b2b2b; line-height: 1.6; font-family: Arial, Helvetica, sans-serif;\"\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.7; color: #2b2b2b; margin: 0 0 16px 0;\"\u003eThe \u003cstrong\u003eWisualarm DHI-HY-GC20A\u003c\/strong\u003e is a standalone carbon monoxide alarm built to continuously monitor CO concentration in the home using a \u003cstrong\u003ehigh-performance Figaro electrochemical sensor\u003c\/strong\u003e. It responds quickly and accurately to rising CO levels while maintaining stable, low-false-alarm performance, and is suitable for homes, restaurants, hotels and any other space that needs carbon monoxide detection.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.7; color: #2b2b2b; margin: 0 0 16px 0;\"\u003eAn \u003cstrong\u003eeasy-to-read \u003c\/strong\u003ethree separate LED indicators for alarm, fault and power status, so occupants can see the alarm's condition at a glance. Power comes from a \u003cstrong\u003ereplaceable 3V CR123A lithium battery rated for up to 10 years\u003c\/strong\u003e, and the unit supports low battery warning, one-click silence and self-test functions from a single control button.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; margin: 20px 0 24px 0;\"\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #008377CF; color: #ffffff; border-radius: 8px; padding: 16px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold; line-height: 1.2;\"\u003eElectrochemical\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; font-weight: 400; margin-top: 4px; letter-spacing: .02em;\"\u003eFigaro CO Sensor\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #008377CF; color: #ffffff; border-radius: 8px; padding: 16px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold; line-height: 1.2;\"\u003e\u0026gt;85dB\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; font-weight: 400; margin-top: 4px; letter-spacing: .02em;\"\u003eAlarm Volume @ 3m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #008377CF; color: #ffffff; border-radius: 8px; padding: 16px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold; line-height: 1.2;\"\u003e10-Yr\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; font-weight: 400; margin-top: 4px; letter-spacing: .02em;\"\u003eBattery Life\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #008377CF; color: #ffffff; border-radius: 8px; padding: 16px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold; line-height: 1.2;\"\u003eLED\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; font-weight: 400; margin-top: 4px; letter-spacing: .02em;\"\u003eCO Display\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #008377CF; color: #ffffff; border-radius: 8px; padding: 16px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold; line-height: 1.2;\"\u003eStandalone\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; font-weight: 400; margin-top: 4px; letter-spacing: .02em;\"\u003eOperation\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #008377CF; color: #ffffff; border-radius: 8px; padding: 16px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold; line-height: 1.2;\"\u003eEN 50291-1\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; font-weight: 400; margin-top: 4px; letter-spacing: .02em;\"\u003eCompliance Standard\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #FDECEC; border-left: 4px solid #D32F2F; border-radius: 6px; padding: 14px 18px; margin: 0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size: 14px; font-weight: bold; color: #d32f2f; text-transform: uppercase; letter-spacing: .04em; margin-bottom: 6px;\"\u003eUK Legal Requirement — Carbon Monoxide Alarms\u003c\/div\u003e\n\u003cdiv style=\"font-size: 15px; color: #2b2b2b; line-height: 1.6;\"\u003eUnder the \u003cstrong\u003eSmoke and Carbon Monoxide Alarm (Amendment) Regulations 2022\u003c\/strong\u003e, private sector landlords in England must install a CO alarm in every room with a fixed combustion appliance (excluding gas cookers); social landlords have been subject to the same requirement since 1 February 2023. The \u003cstrong\u003eDHI-HY-GC20A, certified to EN 50291-1:2018\u003c\/strong\u003e, meets the technical standard required for compliance. Scottish properties are subject to separate requirements under the Housing (Scotland) Act 2006.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #FFF6E5; border-left: 4px solid #E0942A; border-radius: 6px; padding: 14px 18px; margin: 0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size: 14px; font-weight: bold; color: #e0942a; text-transform: uppercase; letter-spacing: .04em; margin-bottom: 6px;\"\u003eStandalone Unit — No Interconnect\u003c\/div\u003e\n\u003cdiv style=\"font-size: 15px; color: #2b2b2b; line-height: 1.6;\"\u003eThe GC20A operates as an \u003cstrong\u003eindependent, standalone alarm\u003c\/strong\u003e and does not interconnect wirelessly with other CO alarms. Where a property needs multiple CO alarms linked together, the wireless interconnected Wisualarm CO alarm range (such as the GC20A-R8) is the appropriate choice instead.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; margin: 0 0 24px 0;\"\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 8px; padding: 16px; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003eHigh-Performance Figaro CO Sensor\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444444; line-height: 1.6;\"\u003eA \u003cstrong\u003eFigaro electrochemical sensor\u003c\/strong\u003e delivers accurate detection of carbon monoxide leakage and responds quickly to rising concentrations.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 8px; padding: 16px; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003e10-Year Replaceable Battery\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444444; line-height: 1.6;\"\u003ePowered by a \u003cstrong\u003ereplaceable 3V CR123A lithium battery\u003c\/strong\u003e with a rated life of up to 10 years, combining long standby time with low power consumption.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 8px; padding: 16px; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003eThree-LED Status Indication\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444444; line-height: 1.6;\"\u003eSeparate \u003cstrong\u003ered, yellow and green LED indicators\u003c\/strong\u003e clearly display alarm, fault and power status respectively, so the device's condition is obvious at a glance.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 8px; padding: 16px; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003eOne-Click Silence \u0026amp; Self-Test\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444444; line-height: 1.6;\"\u003eSupports \u003cstrong\u003elow battery warning, one-click silence, and self-test\u003c\/strong\u003e from a single control, simplifying routine checks and false-alarm management.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 8px; padding: 16px; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003eCompact Wall-Mounted Design\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444444; line-height: 1.6;\"\u003eA \u003cstrong\u003edelicate, compact enclosure\u003c\/strong\u003e designed for simple and convenient wall-mounted installation in any room requiring CO detection.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; overflow: hidden; margin: 0 0 24px 0;\"\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; font-weight: bold; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; padding: 9px 14px;\"\u003eProduct Identity\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eModel number\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eDHI-HY-GC20A\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #FFFFFF; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eBrand\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eWisualarm (by Dahua)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eOperation\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eStandalone\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; font-weight: bold; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; padding: 9px 14px;\"\u003eDetection\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eCollection type\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eCarbon Monoxide (CO)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #FFFFFF; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eSensor type\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eElectrochemical (Figaro)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eAlarm response threshold\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003e50ppm: 60–90 min  |  100ppm: 10–40 min  |  300ppm: \u0026lt;3 min\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; font-weight: bold; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; padding: 9px 14px;\"\u003ePower\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003ePower source\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003e3V CR123A lithium battery (replaceable)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #FFFFFF; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eBattery life\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003e10 years\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eMonitoring current\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003e≤20μA\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #FFFFFF; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eAlarm current\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003e≤10mA\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; font-weight: bold; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; padding: 9px 14px;\"\u003eAlarm Output\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #FFFFFF; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eAlarm volume\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eOver 85dB(A) at 3 metres\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eAlarm mode\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eVisual and audible alarm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #FFFFFF; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eSilencing\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eYes — approx. 45 seconds\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; font-weight: bold; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; padding: 9px 14px;\"\u003eIndicators\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eAlarm\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eRed LED\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #FFFFFF; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eFault\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eYellow LED\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003ePower\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eGreen LED\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; font-weight: bold; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; padding: 9px 14px;\"\u003ePhysical \u0026amp; Environmental\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eDimensions\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003e116.4mm × 71.7mm × 28.3mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #FFFFFF; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eWeight\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003e125 g\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eColour \/ material\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eWhite, PC + ABS\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #FFFFFF; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eInstallation\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eWall mount\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eOperating environment\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eIndoor use only\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #FFFFFF; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eOperating temperature\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003e-10°C to +40°C\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eOperating humidity\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003e≤95% RH, non-condensing\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; font-weight: bold; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; padding: 9px 14px;\"\u003eCertification\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eCertifications\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eTÜV and CE listed\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #FFFFFF; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eCompliance standard\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eEN 50291-1:2018\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003cdetails\u003e\n\u003csummary style=\"padding: 14px 18px; font-size: 15px; font-weight: bold; color: #00625d; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; background: #E6F4F3;\"\u003e\u003cspan\u003eWhere should a carbon monoxide alarm be installed?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px 16px 18px; font-size: 14px; color: #444444; line-height: 1.65; border-top: 1px solid #D9EDEA; background: #ffffff;\"\u003eFit a CO alarm in \u003cstrong\u003eevery room with a fixed combustion appliance\u003c\/strong\u003e — a gas or oil boiler, gas fire, log burner, open fireplace, wood-burning stove or pellet stove — typically within 1–3 metres of the appliance on the same level, plus each sleeping level of the property.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003cdetails\u003e\n\u003csummary style=\"padding: 14px 18px; font-size: 15px; font-weight: bold; color: #00625d; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; background: #E6F4F3;\"\u003e\u003cspan\u003eIs a CO alarm a legal requirement?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px 16px 18px; font-size: 14px; color: #444444; line-height: 1.65; border-top: 1px solid #D9EDEA; background: #ffffff;\"\u003eYes. Under the \u003cstrong\u003eSmoke and Carbon Monoxide Alarm (Amendment) Regulations 2022\u003c\/strong\u003e, private and social landlords in England must fit a CO alarm in any room with a fixed combustion appliance (excluding gas cookers). Scottish properties follow separate requirements under the Housing (Scotland) Act 2006.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003cdetails\u003e\n\u003csummary style=\"padding: 14px 18px; font-size: 15px; font-weight: bold; color: #00625d; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; background: #E6F4F3;\"\u003e\u003cspan\u003eHow long does the battery last?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px 16px 18px; font-size: 14px; color: #444444; line-height: 1.65; border-top: 1px solid #D9EDEA; background: #ffffff;\"\u003eThe GC20A's \u003cstrong\u003ereplaceable 3V CR123A lithium battery\u003c\/strong\u003e is rated for up to 10 years of service, with a low battery warning to give advance notice before replacement is needed.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003cdetails\u003e\n\u003csummary style=\"padding: 14px 18px; font-size: 15px; font-weight: bold; color: #00625d; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; background: #E6F4F3;\"\u003e\u003cspan\u003eCan this alarm be interconnected with other CO alarms?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px 16px 18px; font-size: 14px; color: #444444; line-height: 1.65; border-top: 1px solid #D9EDEA; background: #ffffff;\"\u003eNo, the DHI-HY-GC20A is a \u003cstrong\u003estandalone device\u003c\/strong\u003e. For a wirelessly interconnected CO alarm that links with other WisuLink devices, look to the Wisualarm GC20A-R8 or GC30A-R8 models instead.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Wisualarm","offers":[{"title":"Default Title","offer_id":65885175906653,"sku":"DHI-HY-GC20A","price":14.95,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/WisualarmStandaloneCarbonMonoxideAlarmDHI-HY-GC20A.jpg?v=1789054890"},{"product_id":"wisualarm-mains-smoke-alarm-d1-grade-dhi-hy-sa5ma-10-yr-lithium-backup","title":"Wisualarm Mains Smoke Alarm Grade D1 | DHI-HY-SA5MA | 10-Yr Lithium Backup","description":"\u003c!-- SEO Product Name: Wisualarm Mains Smoke Alarm | DHI-HY-SA5MA | 10-Yr Lithium Backup --\u003e\n\u003cdiv style=\"font-size:16px; max-width:900px; margin:0 auto; color:#2B2B2B; line-height:1.6; font-family:Arial, Helvetica, sans-serif;\"\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eThe \u003cstrong\u003eWisualarm DHI-HY-SA5MA\u003c\/strong\u003e is a mains-powered photoelectric smoke alarm that draws its primary power from a permanent 230V mains connection and backs this up with a \u003cstrong\u003e10-year rechargeable lithium battery\u003c\/strong\u003e, removing the ongoing cost and hassle of replacing a standby battery over the alarm's working life. It suits general residential rooms — living rooms, bedrooms, hallways and landings — wherever early smoke detection is needed.\u003c\/p\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eThe alarm's \u003cstrong\u003e85dB(A) sounder\u003c\/strong\u003e gives clear audible warning alongside a visual LED indicator, and it interconnects by wire with up to \u003cstrong\u003e24 other Wisualarm mains-powered smoke and heat alarms\u003c\/strong\u003e, so one triggered unit sounds every linked alarm across the property. Test and silence functions are supported via any working infrared remote control, useful for ceiling-mounted units out of easy reach.\u003c\/p\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:20px 0 24px 0;\"\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003ePhotoelectric\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eSensor Type\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e≥85dB\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eAlarm Volume @ 3m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e10-Yr\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eLithium Battery Back-up\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003e24\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eMax Interconnected Units\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eGrade D1\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003eBS 5839-6 Classification\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1; min-width:130px; background:#008377CF; color:#ffffff; border-radius:8px; padding:16px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; line-height:1.2;\"\u003eMains + Backup\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px; font-weight:400; margin-top:4px; letter-spacing:.02em;\"\u003ePower Supply\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#E6F4F3; border-left:4px solid #008377CF; border-radius:6px; padding:14px 18px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size:14px; font-weight:700; color:#008377CF; text-transform:uppercase; letter-spacing:.04em; margin-bottom:6px;\"\u003eGrade D1 — Sealed Rechargeable Back-up\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eWith its \u003cstrong\u003enon-replaceable 10-year rechargeable lithium battery\u003c\/strong\u003e providing standby power, the SA5MA is classified as a \u003cstrong\u003eGrade D1 device under BS 5839-6\u003c\/strong\u003e. This eliminates the battery-replacement obligation that applies to Grade D2 alarms, making it well suited to new-build and long-term rental properties where minimal maintenance is a priority.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#E6F4F3; border-left:4px solid #008377CF; border-radius:6px; padding:14px 18px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size:14px; font-weight:700; color:#008377CF; text-transform:uppercase; letter-spacing:.04em; margin-bottom:6px;\"\u003eWired by Default, Wireless-Ready\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eThe SA5MA interconnects over its own dedicated wiring with other Wisualarm mains-powered smoke and heat alarms as standard. Fitting the optional \u003cstrong\u003eDHI-HY-MRF50-R8 wireless module\u003c\/strong\u003e lets it also join a \u003cstrong\u003eWisuLink 868MHz\u003c\/strong\u003e wireless network, useful where running new interconnect cable to every room isn't practical during a retrofit.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FFF6E5; border-left:4px solid #E0942A; border-radius:6px; padding:14px 18px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size:14px; font-weight:700; color:#E0942A; text-transform:uppercase; letter-spacing:.04em; margin-bottom:6px;\"\u003ePhotoelectric Smoke Detection — Not for Kitchens\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eThis is a \u003cstrong\u003esmoke alarm\u003c\/strong\u003e, not a heat alarm, so it should not be fitted in kitchens or other rooms prone to cooking fumes and steam, which can trigger false alarms. For those spaces, use a Wisualarm heat alarm such as the HT5MA or HT5MB instead.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:0 0 24px 0;\"\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003e10-Year Rechargeable Battery\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA sealed \u003cstrong\u003erechargeable lithium battery\u003c\/strong\u003e provides standby power for the alarm's full 10-year service life, with no battery changes required.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003ePhotoelectric Smoke Sensing\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA \u003cstrong\u003ephotoelectric sensing chamber\u003c\/strong\u003e gives fast, reliable detection of visible smoke while resisting many of the nuisance triggers that affect other detection types.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eHardwired Interconnect, 24 Units\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eConnects to up to \u003cstrong\u003e24 other mains-powered Wisualarm smoke and heat alarms\u003c\/strong\u003e over standard interconnect wiring, so one triggered alarm sounds every linked unit in the property.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eOptional Wireless Expansion\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eAdding the \u003cstrong\u003eDHI-HY-MRF50-R8\u003c\/strong\u003e module lets this alarm also communicate over the 868MHz WisuLink wireless mesh, bridging wired and wireless zones in the same system.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eIR Remote Test \u0026amp; Silence\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eSupports \u003cstrong\u003etest and 9-minute silence functions via any working infrared remote control\u003c\/strong\u003e, letting installers and occupants manage the alarm from floor level rather than a ceiling-mounted button.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#F7FAFA; border:1px solid #D9EDEA; border-radius:8px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:15px; font-weight:700; color:#00625D; margin-bottom:6px;\"\u003eClear LED Status Reporting\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px; color:#444444; line-height:1.6;\"\u003eA \u003cstrong\u003egreen\/red LED indicator\u003c\/strong\u003e reports standby and alarm conditions at a glance, so status is clear without needing to open the unit.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; overflow:hidden; margin:0 0 24px 0;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eProduct Identity\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eModel number\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eDHI-HY-SA5MA\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eBrand\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eWisualarm (by Dahua)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eBS 5839-6 Grade\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eGrade D1\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eDetection\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSensor type\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003ePhotoelectric\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSampling period\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e10 s\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm response threshold\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e0.2dB\/m–0.3dB\/m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003ePower\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003ePrimary supply\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eAC 100V–250V, 50\/60Hz (mains)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eStandby battery\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e10-year rechargeable lithium (sealed, non-replaceable)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eAlarm Output\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm volume\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003e≥85dB(A) at 3 metres\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm mode\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eVisual and audible alarm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eSilencing\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eYes — 9 minutes, including via IR remote\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eIndicators\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eStandby\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eGreen LED remains lit\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eAlarm\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eRed LED flashes once per second\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eInterconnection\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eWired interconnect\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eUp to 24 hardwire interconnected units\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eWireless interconnect\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eUp to 24 units via optional DHI-HY-MRF50-R8 WisuLink module\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#008377CF; color:#ffffff; font-weight:700; font-size:12px; letter-spacing:.06em; text-transform:uppercase; padding:9px 14px;\"\u003eInstallation\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F0F9F8; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:0 0 44%; padding:10px 14px; font-size:14px; font-weight:600; color:#333333;\"\u003eInstallation\u003c\/div\u003e\n\u003cdiv style=\"flex:1; padding:10px 14px; font-size:14px; color:#222222;\"\u003eCeiling mount\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eDoes this alarm need its battery replaced?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eNo. The SA5MA uses a \u003cstrong\u003esealed 10-year rechargeable lithium battery\u003c\/strong\u003e that is not user-replaceable and is designed to last the alarm's full service life, provided it remains powered from the mains between any outages.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eHow many alarms can be linked together?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eUp to \u003cstrong\u003e24 Wisualarm mains-powered smoke and heat alarms\u003c\/strong\u003e can be hardwired together on the interconnect line, so that any single alarm triggering sounds every linked unit in the property.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eIs this alarm suitable for a kitchen?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eNo. This is a \u003cstrong\u003ephotoelectric smoke alarm\u003c\/strong\u003e, and cooking fumes and steam can trigger false alarms. Fit a Wisualarm heat alarm, such as the HT5MA or HT5MB, in kitchens and similar spaces instead.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eCan this alarm work with wireless Wisualarm devices?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eYes, if fitted with the optional \u003cstrong\u003eDHI-HY-MRF50-R8 wireless interconnect module\u003c\/strong\u003e, which lets the SA5MA join the 868MHz WisuLink mesh alongside battery-powered wireless alarms.\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003cdiv style=\"border:1px solid #D9EDEA; border-radius:8px; margin-bottom:10px; overflow:hidden;\"\u003e\u003cdetails\u003e\u003csummary style=\"padding:14px 18px; font-size:15px; font-weight:700; color:#00625D; cursor:pointer; list-style:none; display:flex; align-items:center; justify-content:space-between; background:#E6F4F3;\"\u003e\u003cspan\u003eWhat's the difference between the SA5MA and SA5MB?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px 16px 18px; font-size:14px; color:#444444; line-height:1.65; border-top:1px solid #D9EDEA; background:#ffffff;\"\u003eBoth are mains-powered photoelectric smoke alarms with the same 24-unit interconnect capability. The SA5MA uses a \u003cstrong\u003esealed 10-year rechargeable lithium battery\u003c\/strong\u003e (Grade D1), while the SA5MB uses a \u003cstrong\u003ereplaceable 9V alkaline battery\u003c\/strong\u003e (Grade D2).\u003c\/div\u003e\u003c\/details\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Wisualarm","offers":[{"title":"Default Title","offer_id":65885654155613,"sku":"DHI-HY-SA5MA","price":32.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/WisualarmMainsSmokeAlarm.jpg?v=1789052688"},{"product_id":"wisualarm-wireless-interconnect-module-dhi-hy-mrf50-r8-868mhz-24-unit","title":"Wisualarm Wireless Interconnect Module | DHI-HY-MRF50-R8 | 868MHz 24-Unit","description":"\u003c!-- SEO Product Name: Wisualarm Wireless Interconnect Module | DHI-HY-MRF50-R8 | 868MHz 24-Unit --\u003e\n\u003cdiv style=\"font-size: 16px; max-width: 900px; margin: 0 auto; color: #2b2b2b; line-height: 1.6; font-family: Arial, Helvetica, sans-serif;\"\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.7; color: #2b2b2b; margin: 0 0 16px 0;\"\u003eThe \u003cstrong\u003eWisualarm DHI-HY-MRF50-R8\u003c\/strong\u003e is a wireless interconnect module that fits into the base of a compatible Wisualarm mains-powered smoke or heat alarm, giving it the ability to join the \u003cstrong\u003e868MHz WisuLink wireless mesh\u003c\/strong\u003e alongside battery-powered wireless alarms. It's the bridge component for hybrid installations, where some detectors are hardwired together and others communicate wirelessly, without needing every alarm on the same physical interconnect line.\u003c\/p\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.7; color: #2b2b2b; margin: 0 0 16px 0;\"\u003eThe module is \u003cstrong\u003epowered directly from the host alarm head\u003c\/strong\u003e, so it needs no separate battery or power supply of its own, and links wirelessly with up to \u003cstrong\u003e24 other WisuLink-compatible devices\u003c\/strong\u003e. A flashing red LED indicates active RF transmission, giving a clear visual confirmation that the module is communicating with the rest of the network.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; margin: 20px 0 24px 0;\"\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #008377CF; color: #ffffff; border-radius: 8px; padding: 16px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold; line-height: 1.2;\"\u003e868MHz\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; font-weight: 400; margin-top: 4px; letter-spacing: .02em;\"\u003eRF Frequency\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #008377CF; color: #ffffff; border-radius: 8px; padding: 16px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold; line-height: 1.2;\"\u003e24\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; font-weight: 400; margin-top: 4px; letter-spacing: .02em;\"\u003eMax Interconnected Units\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #008377CF; color: #ffffff; border-radius: 8px; padding: 16px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold; line-height: 1.2;\"\u003e1000m\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; font-weight: 400; margin-top: 4px; letter-spacing: .02em;\"\u003eRF Range (Open Air)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #008377CF; color: #ffffff; border-radius: 8px; padding: 16px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold; line-height: 1.2;\"\u003e11.9g\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; font-weight: 400; margin-top: 4px; letter-spacing: .02em;\"\u003eWeight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #008377CF; color: #ffffff; border-radius: 8px; padding: 16px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold; line-height: 1.2;\"\u003ePowered\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; font-weight: 400; margin-top: 4px; letter-spacing: .02em;\"\u003eFrom Host Alarm Head\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #008377CF; color: #ffffff; border-radius: 8px; padding: 16px 10px; text-align: center; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold; line-height: 1.2;\"\u003eCE \/ UKCA\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; font-weight: 400; margin-top: 4px; letter-spacing: .02em;\"\u003eCertifications\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #E6F4F3; border-left: 4px solid #008377CF; border-radius: 6px; padding: 14px 18px; margin: 0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-size: 14px; font-weight: bold; color: #008377cf; text-transform: uppercase; letter-spacing: .04em; margin-bottom: 6px;\"\u003eBridging Wired and Wireless Zones\u003c\/div\u003e\n\u003cdiv style=\"font-size: 15px; color: #2b2b2b; line-height: 1.6;\"\u003eFitting this module to a mains-powered Wisualarm smoke or heat alarm — such as the HT5MA, HT5MB, SA5MA or SA5MB — lets that hardwired unit also communicate with battery-powered wireless alarms elsewhere in the property. This is particularly useful in retrofit projects where running new interconnect cable to every room isn't practical, but whole-property alarm coverage is still required.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; margin: 0 0 24px 0;\"\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 8px; padding: 16px; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003ePowered From the Host Alarm\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444444; line-height: 1.6;\"\u003eDraws its power directly from the \u003cstrong\u003ealarm head it's fitted into\u003c\/strong\u003e, requiring no separate battery or mains connection of its own.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 8px; padding: 16px; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003e868MHz WisuLink Wireless\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444444; line-height: 1.6;\"\u003eCommunicates over the same \u003cstrong\u003e868MHz WisuLink frequency\u003c\/strong\u003e used across the Wisualarm wireless range, ensuring full compatibility with other -R8 devices.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 8px; padding: 16px; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003eUp to 24 Interconnected Devices\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444444; line-height: 1.6;\"\u003eLinks wirelessly with up to \u003cstrong\u003e24 other WisuLink-compatible devices\u003c\/strong\u003e, extending a hardwired alarm's reach into a mixed wired\/wireless network.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 8px; padding: 16px; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003eLong RF Range\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444444; line-height: 1.6;\"\u003eRated for a wireless range of \u003cstrong\u003eup to 1000 metres in open, interference-free conditions\u003c\/strong\u003e, giving reliable coverage across most residential and small commercial properties.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 8px; padding: 16px; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003eClear RF Status Indicator\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444444; line-height: 1.6;\"\u003eA \u003cstrong\u003eflashing red LED\u003c\/strong\u003e confirms active RF transmission, giving installers and occupants a simple visual check that the module is communicating correctly.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #F7FAFA; border: 1px solid #D9EDEA; border-radius: 8px; padding: 16px; margin: 4px;\"\u003e\n\u003cdiv style=\"font-size: 15px; font-weight: bold; color: #00625d; margin-bottom: 6px;\"\u003eCompact, Low-Profile Fit\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444444; line-height: 1.6;\"\u003eAt just \u003cstrong\u003e53.5mm × 38.2mm × 11.7mm and 11.9g\u003c\/strong\u003e, the module fits discreetly into the compatible alarm's base without adding noticeable bulk.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; overflow: hidden; margin: 0 0 24px 0;\"\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; font-weight: bold; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; padding: 9px 14px;\"\u003eProduct Identity\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eModel number\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eDHI-HY-MRF50-R8 (also listed as HY-MRF60-R8)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #FFFFFF; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eBrand\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eWisualarm (by Dahua)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eProduct type\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eWireless interconnect module\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; font-weight: bold; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; padding: 9px 14px;\"\u003ePower\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003ePower supply\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003ePowered from host alarm head\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; font-weight: bold; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; padding: 9px 14px;\"\u003eWireless\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eRF frequency\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003e868MHz (-R8 variant) \/ 925MHz (-R9 variant)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #FFFFFF; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eRF range\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eUp to 1000 metres in open, interference-free area\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eMaximum interconnected units\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eUp to 24 WisuLink RF devices\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #FFFFFF; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eRF visual indicator\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eFlashing red LED during RF transmission\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; font-weight: bold; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; padding: 9px 14px;\"\u003ePhysical \u0026amp; Environmental\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eDimensions\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003e53.5mm × 38.2mm × 11.7mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #FFFFFF; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eWeight\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003e11.9 g\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eColour \/ casing\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eWhite, PC+ABS\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #FFFFFF; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eOperating temperature\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003e-10°C to +55°C\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eOperating humidity\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003e≤95% RH, non-condensing\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; font-weight: bold; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; padding: 9px 14px;\"\u003eCertification\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #F0F9F8; border-bottom: 1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex: 0 0 44%; padding: 10px 14px; font-size: 14px; font-weight: 600; color: #333333;\"\u003eCertifications\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-size: 14px; color: #222222;\"\u003eCE, UKCA, PSTI, RCM\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003cdetails\u003e\n\u003csummary style=\"padding: 14px 18px; font-size: 15px; font-weight: bold; color: #00625d; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; background: #E6F4F3;\"\u003e\u003cspan\u003eWhat does this module do?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px 16px 18px; font-size: 14px; color: #444444; line-height: 1.65; border-top: 1px solid #D9EDEA; background: #ffffff;\"\u003eIt's a \u003cstrong\u003ewireless interconnect module\u003c\/strong\u003e that fits into the base of a compatible mains-powered Wisualarm smoke or heat alarm, giving that hardwired unit the ability to also communicate wirelessly with other WisuLink devices at 868MHz.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003cdetails open=\"\"\u003e\n\u003csummary style=\"padding: 14px 18px; font-size: 15px; font-weight: bold; color: #00625d; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; background: #E6F4F3;\"\u003e\u003cspan\u003eWhich alarms is this module compatible with?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px 16px 18px; font-size: 14px; color: #444444; line-height: 1.65; border-top: 1px solid #D9EDEA; background: #ffffff;\"\u003eIt's designed for \u003cstrong\u003emains-powered Wisualarm smoke and heat alarms\u003c\/strong\u003e with a compatible base, such as the HT5MA, HT5MB, SA5MA and SA5MB, allowing them to join a wireless network alongside battery-powered wireless alarms.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003cdetails\u003e\n\u003csummary style=\"padding: 14px 18px; font-size: 15px; font-weight: bold; color: #00625d; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; background: #E6F4F3;\"\u003e\u003cspan\u003eDoes the module need its own power source?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px 16px 18px; font-size: 14px; color: #444444; line-height: 1.65; border-top: 1px solid #D9EDEA; background: #ffffff;\"\u003eNo. The module is \u003cstrong\u003epowered directly from the host alarm head\u003c\/strong\u003e once fitted, so it doesn't require a separate battery or mains connection.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003cdetails\u003e\n\u003csummary style=\"padding: 14px 18px; font-size: 15px; font-weight: bold; color: #00625d; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; background: #E6F4F3;\"\u003e\u003cspan\u003eHow many devices can this module connect to?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px 16px 18px; font-size: 14px; color: #444444; line-height: 1.65; border-top: 1px solid #D9EDEA; background: #ffffff;\"\u003eIt links wirelessly with up to \u003cstrong\u003e24 other WisuLink-compatible devices\u003c\/strong\u003e, matching the maximum interconnect capacity of the wider Wisualarm wireless range.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border: 1px solid #D9EDEA; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003cdetails\u003e\n\u003csummary style=\"padding: 14px 18px; font-size: 15px; font-weight: bold; color: #00625d; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; background: #E6F4F3;\"\u003e\u003cspan\u003eIs HY-MRF60-R8 a different product?\u003c\/span\u003e\u003csvg width=\"16\" height=\"16\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"#008377CF\" stroke-width=\"2.5\"\u003e\u003cpolyline points=\"6 9 12 15 18 9\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px 16px 18px; font-size: 14px; color: #444444; line-height: 1.65; border-top: 1px solid #D9EDEA; background: #ffffff;\"\u003eNo — Dahua's own documentation and datasheets reference the \u003cstrong\u003eDHI-HY-MRF50-R8 and HY-MRF60-R8\u003c\/strong\u003e part numbers for the same physical wireless interconnect module, sharing identical specifications.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Wisualarm","offers":[{"title":"Default Title","offer_id":65891508322653,"sku":"DHI-HY-MRF50-R8","price":17.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/WisualarmWirelessInterconnectModuleDHI-HY-MRF50-R8.jpg?v=1789123404"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/collections\/Wisualarm.png?v=1789121025","url":"https:\/\/qualityheating.co.uk\/collections\/wisualarm.oembed","provider":"AIZO Quality Heating","version":"1.0","type":"link"}