{"product_id":"first-alert-brk-carbon-monoxide-detector-hardwired-co-alarm","title":"First Alert BRK Carbon Monoxide Detector - Hardwired CO Alarm","description":"\u003cp\u003eIn this review the First Alert BRK Carbon Monoxide Detector (CO5120BN) is assessed as a practical hardwired CO alarm suited to homeowners who want a dependable, low-maintenance safety device. The biggest reason to consider this unit is its reliable electrochemical sensor paired with hardwired 120 volt power and a 9 volt battery backup, which together provide continuous protection even during outages. It is straightforward to install for anyone comfortable with basic wiring and values a microprocessor-controlled alarm that reduces false alarms.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardwired 120 volt:\u003c\/strong\u003e Wires directly into the home's electrical system for continuous powered monitoring without relying solely on replaceable batteries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery backup:\u003c\/strong\u003e The included 9 volt battery keeps the alarm active during power outages so detection continues uninterrupted.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrochemical sensor:\u003c\/strong\u003e The advanced sensor accurately detects carbon monoxide and is less prone to interference than older sensor types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicroprocessor control:\u003c\/strong\u003e Electronic processing helps minimize nuisance and false alarms so occupants are alerted only when levels are concerning.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e85 dB horn:\u003c\/strong\u003e A loud alarm alerts sleeping or distant household members when carbon monoxide levels become dangerous.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTamper resistant bracket:\u003c\/strong\u003e The locking mount helps keep the unit securely installed where it will be most effective.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis detector is best for homeowners and renters whose properties already have hardwired alarm systems or who want a permanently powered CO alarm with battery backup. It is a solid choice for those who prioritize accurate detection and a device that integrates into household wiring without frequent battery swaps.\u003c\/p\u003e\u003cp\u003eIt may be less suitable for people who need a fully portable detector or who cannot or prefer not to perform any wiring; in those cases a plug-in or battery-only model would be easier. Also, buyers who want smart-home connectivity should look elsewhere, as this unit focuses on reliable sensing rather than network features.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eReliable electrochemical sensor offers accurate CO detection and steady performance.\u003c\/li\u003e\n\u003cli\u003eHardwired 120 volt power with 9 volt battery backup ensures continuous protection during outages.\u003c\/li\u003e\n\u003cli\u003eMicroprocessor control reduces false alarms, improving day-to-day usability.\u003c\/li\u003e\n\u003cli\u003eEasy installation for users comfortable with basic wiring and includes a tamper resistant bracket for security.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSome customers report mixed lifespan expectations, so eventual replacement timing can vary.\u003c\/li\u003e\n\u003cli\u003eOccasional chirp frequency issues have been noted by owners, which can be disruptive at night.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eFirst Alert BRK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eCO5120BN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower\u003c\/td\u003e\n\u003ctd\u003e120 volt hard wired with 9 volt battery backup\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensor type\u003c\/td\u003e\n\u003ctd\u003eElectrochemical carbon monoxide sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlarm output\u003c\/td\u003e\n\u003ctd\u003e85 decibel horn\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eTamper resistant mounting bracket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003ePlastic, imported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe First Alert BRK CO5120BN is a practical, value-focused hardwired carbon monoxide detector that delivers accurate sensing and reliable backup power, making it a good buy for homeowners who want a low-fuss, permanently powered alarm. It is recommended for installations where continuous protection and minimized false alarms matter most, though those seeking wireless or smart features should consider alternatives.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eDoes this unit work during a power outage?\u003c\/strong\u003e\u003cbr\u003eYes. The alarm uses a 9 volt battery backup to maintain operation if the 120 volt supply is interrupted.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat sensor technology does it use?\u003c\/strong\u003e\u003cbr\u003eThe unit uses an electrochemical carbon monoxide sensor, which provides accurate CO detection and reduced interference.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs installation difficult?\u003c\/strong\u003e\u003cbr\u003eInstallation requires wiring into a 120 volt circuit, so it is straightforward for users comfortable with basic electrical work or a professional installer.\u003c\/p\u003e","brand":"First Alert","offers":[{"title":"Default Title","offer_id":48226969157851,"sku":"B000H2673K","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61oVRUYntvL._AC_SL1500.jpg?v=1770722652","url":"https:\/\/gearmusthave.com\/products\/first-alert-brk-carbon-monoxide-detector-hardwired-co-alarm","provider":"GearMustHave","version":"1.0","type":"link"}