These detectors are designed to measure the concentration of carbon monoxide in the air (in parts per million, or ppm) and sound an alarm if enough of the chemical is around long enough to become a problem. Faulty stoves or furnaces and vehicles or portable generators operated indoors are all potential culprits of carbon monoxide poisoning, which kills hundreds of people and hospitalizes tens of thousands every year in the U.S.įortunately, we have carbon monoxide detectors to warn us before we’re in danger. Carbon monoxide, sometimes called the invisible killer, is a gaseous byproduct of incomplete combustion that can seep from broken or misused heating systems at hazardous levels. And in abundance, it can kill within minutes. Ionization alarms are generally more sensitive to fast flaming fires and photoelectric alarms are generally more sensitive to smoldering fires.Carbon monoxide flies under the radar of human senses, but carbon monoxide detectors take advantage of how the chemical alters the color or the electrical resistance of certain materials or fosters electrochemical reactions to measure how much of the gas is in the air. For maximum protection, use both ionization and photoelectric sensing technologies. Smoke particles of varying number and size are produced in all fires.Product Dimensions (LxWxH): 5.6 x 1.9 x 5.6 in.Improved UV Resistance: Keeps alarm from discoloring over time.Dust Cover: Keeps alarm clean during construction.Tamper Resistant: Includes Locking Pins.Easy Installation: Perfect Mount System includes Gasketless Base.Single Button: One press to silence and test alarm.Intelligent Sensing Technology: Helps reduce nuisance alarms.Interconnect: Can be linked with other compatible BRK and First Alert hardwired smoke and carbon monoxide detectors.If the tab broke away before the alarm was activated, you can use a toothpick to move the switch over to test the alarm. If you have a 10-Year model, the smoke alarm may not have been properly activated.AC and AC/DC units will have a power indicator light (red or green) that shines continuously when they are receiving electrical power. After installing new batteries, be sure to test your smoke detector. If the battery is loose, in cannot power the smoke alarm properly. Even if the alarm sounded briefly when the battery touched the terminals, you still need to make sure it is snapped securely in place. Your battery may not be installed properly or snapped all the way in place.Try holding it down for up to 10 seconds (20 seconds on photoelectric models). You may not be holding the test button down long enough.When you are testing your smoke alarm, there are a number of reasons why the alarm might not sound: It is important that you frequently test your smoke alarms. Tamper-resistant locking pins prevent unauthorized disabling of the CO smoke alarm.įirst Alert Hardwired Smoke/Monoxide Alarm SC9120B The side-load battery compartment makes changing the 9-volt battery simple. The First Alert Combination Smoke and Carbon Monoxide Alarm integrates with existing wiring and features a universal mounting bracket that makes installing the unit quick and easy. The latching alarm indicator on the CO smoke alarm automatically identifies which unit initiated the alarm–even after the conditions that set off the alarm have subsided. Once one alarm is triggered, all connected CO smoke alarms will sound. This hardwired combination smoke and carbon monoxide detector can be connected to other compatible BRK or First Alert CO smoke detectors within a single-family residence. Lights on the face of the alarm tell you what the threat is, and false alarms can be silenced with a single button.Ĭonnect to Other Alarms for Greater Coverage Its latching alarm indicator automatically identifies which unit initiated the alarm–even after the conditions that set off the alarm have subsided.ĭesigned to meet the latest construction requirements, the First Alert Combination Smoke and Carbon Monoxide Alarm detects two threats, smoke and carbon monoxide. This CO smoke detector can be connected to other compatible BRK and First Alert hardwired smoke and carbon monoxide detectors. It includes a 9-volt battery for continued function in the event of a power outage, and it features a test/silence button, tamper-resistant locking brackets, and a universal mounting bracket. The First Alert BRK SC9120B Hardwired Combination Smoke and Carbon Monoxide Alarm uses an electrochemical CO sensing technology and Ionization sensor for smoke detection. Hardwired Combination Smoke/Carbon Monoxide Alarm
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