Combustible Gas Detector, Calibration Certificate Type Not Certified, Gases Detected Acetone, Acetylene, Benzene, Butane, Ethanol, Ethylene Oxide, Gasoline, Hexane, Hydrogen, Industrial Solvents, Isobutane, Methane, Methanol, Naphtha, Paint Thinners, Propane, Includes Sensor Tip, Soft Carrying Case, Maximum Operating Temperature 104 Degrees F, Minimum Operating Temperature 32 Degrees F, PPM Accuracy 20 ppm (High Sensitivity Methane), 50 ppm (Low Sensitivity Methane)