Carbon Monoxide Detectors

Buying Carbon Monoxide Detectors

Unlike fire alarms, carbon monoxide detectors measure the presence of carbon monoxide in the air and keep track of how long it is present. They trigger an alarm if carbon monoxide is present at low levels for a long time or at high levels for a short time. Most carbon monoxide detectors also save peak values in a memory for later retrieval. About's Guide to Chemistry, Anne Marie Helmenstine, Ph.D., provides an in-depth understanding of how carbon monoxide detectors work.

There are many more options when shopping for a carbon monoxide detector than when shopping for fire alarms. Carbon monoxide detector placement is more versatile than smoke detectors. There are several models that plug directly into home AC outlets. Some carbon monoxide detectors talk, while others have digital displays. The following are a sampling of the types of carbon monoxide detectors available.

Combination Smoke/Carbon Monoxide Detectors

These units utilize both smoke and carbon monoxide detection technology. Unfortunately, fire alarms utilize two different types of sensors to detect smoke. These units rely on only one type of sensor. Learn more about fire alarms before making this type of purchase.

Kidde Combination Carbon Monoxide & Smoke Talking Alarm - KN-COSM-IB
This unit runs on AC power with a battery backup. It talks to tell you if it is alarming for smoke or carbon monoxide detection. It is capable of connecting to other units - allowing it to sound several alarms if one is triggered.

Kidde Nighthawk Talking Smoke & CO Alarm KN-COSM-B
Same as above, but without the ability to connect to other units.

First Alert DC Combination Smoke and Carbon Monoxide Alarm - SC07CN
The only combination model here that uses a photoelectric sensor for the smoke alarm. Includes a remote for silencing false alarms and testing the unit.

Carbon Monoxide Detectors

Kidde Safety Products NIGHTHAWK Carbon Monoxide Alarm with Battery KN-COPP-B
Battery-powered carbon monoxide detector with a digital display.

First Alert AC Maximum Protection plus Ultimate Convenience Carbon Monoxide Alarm - FCD4CN-3
Unit covers an AC outlet.

First Alert Carbon Monoxide Plug in Alarm
Another direct plug-in model.

BRK Carbon Monoxide Detector C05120BN
Hardwired unit that connects to as many as 18 others.