A carbon dioxide detector is an essential safety device that prevents CO poisoning. This toxic and colorless gas cannot be detected by human senses, but can build up in an area or room at deadly levels without people realizing it until it’s too late.

The main component of any carbon monoxide detector is the sensor, which measures CO2 concentrations in parts per million. Many modern sensors use non-dispersive infrared (NDIR) technology, which essentially counts the number of infrared light molecules absorbed by the carbon dioxide gas molecules in a sample of air. This signal is then processed to generate an alarm or alert.

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Some detectors are designed to be system-connected, meaning they can send an alert directly to a monitoring service that can dispatch emergency services as necessary. This feature is most common in commercial or industrial settings, where a carbon monoxide detector can be part of an overall safety and monitoring system.

Most CO detectors will sound an alarm when they reach dangerous levels of carbon dioxide. Some models also display the current level of CO in parts per million on a digital screen.

Ideally, you should install carbon monoxide detectors at least five feet above the floor and away from fireplaces or other flame-producing appliances to avoid false readings. Make sure to test the detectors regularly and replace the batteries when needed. This helps keep the detectors in working order and ensures that they will alert you of any leaks or elevated CO levels.