Carbon Monoxide Detector

PRO-LAB Carbon Monoxide Test Kit can detect the Invisible and Odorless carbon monoxide gas. The sensor button will turn grey to black within fifteen minutes. The sensor button will return to it is original color and be ready for reuse when exposed to fresh air (unless sensor has been overexposed). Even a slight darkening of the sensor button indicates a dangerous amount of carbon monoxide.”,”highlights”:[“Detects invisible and odorless carbon monoxide gas”,”Sensor light turns gray to black in 15 minutes”,”Made to last up to 6 months for optimal detection”