Gas Detector Sensor Gas Detected Methane Measurement Range 0 to 100 Percent LEL Compatible Detector Model/Series PM400-P PM400-P2G Compatible Detector Grainger Part Number 54XL76 68KA08 Sensor Type Catalytic For Detector Type Portable T90 Response Time 10 sec Compatible Detector Manufacturer Part Number PM400-IR PM400-IR2G PM400-P PM400-P2G Sensor Life 2 yr Series PM400 Series Sub-Brand AimSafety