Gas Detector Sensor Gas Detected Carbon Monoxide Measurement Range 0 to 500 ppm Compatible Detector Model/Series GasAlert Micro Compatible Detector Manufacturer Part Number BW Technologies GasAlertMicro Micro Micro 5 Series Micro Micro 5 Sub-Brand BW Resolution 1 ppm Operating Temperature - Maximum 104 Degrees F Operating Temperature - Minimum -4 Degrees F Chemical Formula CO H2S