Extech CO15 Carbon Monoxide Meter, Green

Dual LCD simultaneously displays carbon monoxide (CO) level and maximum CO reading taken since meter is powered on Long life electrochemical sensor Adjustable CO warning level at 25, 30, 35, 45, 50, 70, 100 and 200Ppm (alarm is pre-set to 25Ppm) Audible and visual alarm when CO level reaches the warning set point level Choose from 3 calibration points: 0 (pre-set), 100, and 500Ppm, Weight: 0.3 pounds, Manufacturer: Extech