From traditional alarm clocks to smartphone alarms — even apps that force you to solve math problems before the alarm shuts ...

Low-level carbon monoxide alarms track levels of CO gas over time and sound a loud alarm when those levels exceed certain parameters. For instance, a 50 PPM measurement will activate most alarms ...

Buy at Amazon.com Buy at Wayfair.com Detects CO, propane, and natural gas leaks Loud alarm Backlit digital display is easy to read First Alert has a range of reliable alarms, and the Explosive Gas ...

Its loud alarm could be clearly heard from across the ... The alarm and light shut off simultaneously when the sensor no longer detected any aerosol. The X-Sense SC01 lacks an ionization sensor ...

Specifically, the detectors fail to alert users when exposed ... They are designed to alert users with a flashing red LED and a loud alarm when dangerous levels of carbon monoxide or smoke are ...