Gas Detector Sensor Gas Detected Hydrogen Sulfide Measurement Range 0 to 500 ppm Compatible Detector Model/Series GasBadge Pro Compatible Detector Grainger Part Number 1TAY7 Sensor Type Electrochemical For Detector Type Portable Sensor Life 2 yr Series GasBadge Pro Resolution 0.1 ppm Operating Temperature - Maximum 140 Degrees F Operating Temperature - Minimum -40 Degrees F Chemical Formula H2S