If carbon monoxide is present, the sensor button will turn grey to black within fifteen minuets. The sensor button will return to it''s original color and be ready for reuse when exposed to fresh air (Unless sensor has been overexposed). Even a slight darkening of the sensor AutoZone indicates a dangerous amount of carbon monoxide.
Rated #1
Safe and easy to use
More sensitive than electronic detectors
Detects the invisible orderless gas
This test kit detects the deadly invisible and odorless gas. if carbon monoxide is present the sensor button will return to its original color and be ready for reuse when exposed to fresh air. even a slight darkening of the sensor button indicates a dangerous amount of carbon monoxide
Carbon monoxide is a deadly - odorless - tasteless - colorless gas
Last up to 6 months