Carbon monoxide alarms are devices designed to detect the presence of carbon monoxide (CO) gas in the air. CO is a colorless, odorless gas produced by burning fossil fuels, and it can be harmful or even fatal in high concentrations. These alarms work by sensing the levels of CO and sounding an alert when they reach dangerous thresholds, helping to protect individuals from potential poisoning. It is recommended to install carbon monoxide alarms near sleeping areas and on every level of a home. Regular maintenance, such as testing the alarms monthly and replacing batteries as needed, ensures they function properly. Many alarms also come with digital displays that show CO levels, providing additional safety information.