Gas Detector Sensor Gas Detected Carbon Monoxide Hydrogen Sulfide Measurement Range Carbon Monoxide (0 to 500 ppm) Hydrogen Sulfide (0 to 100 ppm) Compatible Detector Model/Series PM400-IR PM400-IR2G PM400-P PM400-P2G Compatible Detector Grainger Part Number 54XL76 54XL77 68KA07 68KA08 Sensor Type Electrochemical For Detector Type Portable T90 Response Time 30 sec Compatible Detector Manufacturer Part Number PM400-IR PM400-IR2G PM400-P PM400-P2G Sensor Life 2 yr