Gas Detector Sensor, Gas Detected Combustible Gas, Measurement Range 0 to 100 ppm, Compatible Detector Model/Series AreaRAE Plus, AreaRAE Pro, MultiRAE, ToxiRAE Pro, Sensor Type Catalytic, T90 Response Time 15 sec, Sensor Life 2 yr, Series AreaRAE Plus, AreaRAE Pro, MultiRAE, ToxiRAE Pro, Sub-Brand RAE, Resolution 1 Percent LEL, Operating Temperature - Maximum 104 Degrees F, Operating Temperature - Minimum -4 Degrees F, Chemical Formula LEL