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Kidde KN-COEG-3 Carbon Monoxide Alarm

Post Updated June 6, 2026 by Perry Penn

The Kidde KN-COEG-3 is a plug in, AC powered carbon monoxide alarm and explosive gas monitor. It has a dual function, therefore, keeping families and homes safe. The device also comes with battery backup power through the included 9V battery. This ensures that, should there be an electric power outage, the presence of dangerous gas levels may still be detected.

Kidde Carbon Monoxide Detector, Plug-in Carbon Monoxide Detector with AA Battery Backup, 85 dB Alarm

Kidde Carbon Monoxide Detector, Plug-in Carbon Monoxide Detector with AA Battery Backup, 85 dB Alarm

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The device has a significant internal memory that can show how the highest level of dangerous gases was reached since the last reset or test. A simple push of the Peak Level Button will show this. Additionally, it has a continuous digital display on which you can see whether any carbon monoxide is present and if so, how much. The gas sensor, meanwhile, detects propane and methane for added protection through its metal oxide sensor.

Kidde is a known and trusted brand in the world of family and home protection. The Kidde KN-COEG-3 carbon monoxide and explosive gas monitor is very easy to install as it can be simply plugged in. It is fitted with a 6′ power cord that allows you to place it anywhere, although it can also be wall-mounted. It is a UL listed device that comes with a five year limited warranty and seven year life warranty for added protection.

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