Carbon monoxide (CO) detectors typically last between 5 and 10 years, depending on the model and manufacturer. Over time, the CO sensor inside the device degrades, reducing its ability to detect dangerous levels of carbon monoxide. Even if the detector appears to function normally, it may no longer provide accurate or reliable protection beyond its expiration date.
How to Determine When to Replace Your Carbon Monoxide Detector
- Check the Manufacturer’s Expiration Date – Most CO detectors have a label or printed date on the back indicating when they should be replaced.
- Pay Attention to End-of-Life Warnings – Many modern CO detectors will beep or flash to alert you when they reach the end of their lifespan.
- Manually Track the Installation Date – If your detector doesn’t have an expiration alert, write down the installation date and set a reminder to replace it within the manufacturer’s recommended timeframe.
- Replace Batteries Regularly – While battery changes help maintain functionality, they do not extend the overall lifespan of the detector itself.
Why Do Carbon Monoxide Detectors Expire?
- The electrochemical sensors inside CO detectors become less sensitive over time, reducing accuracy.
- Dust, dirt, and humidity can interfere with the detector’s performance.
- Older models may not meet the latest safety standards and technological advancements.
How to Ensure Continuous CO Protection
- Test the detector monthly to verify proper operation.
- Replace batteries annually, unless using a 10-year sealed lithium battery model.
- Upgrade to a smart CO detector for enhanced safety and real-time alerts.
- Install CO detectors in key locations, including bedrooms, hallways, and near fuel-burning appliances.
For comprehensive fire safety solutions, including CO detector maintenance and fire protection services, visit our Fire Alarm System Monitoring page.
