The detector measures this current and triggers an alarm when it reaches a certain threshold. How quickly carbon monoxide (or CO) will set off your detector depends on the concentration of the gas.

Kidde Nighthawk Carbon Monoxide/Explosive Gas Alarm ↓ Jump to Review BEST BANG FOR THE BUCK: Kidde Battery-Operated Carbon Monoxide Detector ↓ Jump to Review BEST PLUG-IN: First Alert CO600 ...

A reliable CO detector is the biggest piece of keeping your home safe from the gas to prevent medical problems and even death. In its early stages, carbon monoxide poisoning can lead to headaches ...