Gas Detector Sensor, Gas Detected Oxygen, Measurement Range 0 to 25 Percent vol, Compatible Detector Model/Series Microgard, Sensor Type Not Applicable, For Detector Type Portable, T90 Response Time 15 sec, Compatible Detector Manufacturer Part Number Passport Gas Detectors, Sensor Life 2 yr, Series Microgard, Features Not Applicable, Cable Length 25 ft, Resolution 0.1 Percent vol, Operating Temperature – Maximum 40 Degrees F, Operating Temperature – Minimum 0 Degrees F, Chemical Formula O2