The answer to 'lifespan of carbon monoxide detector' is that most carbon monoxide detectors have a lifespan of 5-7 years. These devices contain sensors that can degrade over time, so it's important to replace them every 5-7 years to ensure they continue to accurately detect dangerous levels of carbon monoxide in your home.
Carbon monoxide detectors use different sensor technologies, and the lifespan can vary depending on the type. Electrochemical sensors tend to last 5-7 years, while semiconductor sensors may last 2-5 years. It's a good idea to check the manufacturer's recommended replacement timeline for your specific detector model.