Combustible Gas Detector Detects Acetaldehyde Ammonia Benzene Carbon Monoxide Ethane Ethanol Ethylene Formaldehyde Hexane Hydrogen Hydrogen Sulfide Iso-Butane Methane P-Xylene Propane Toluene Measuring Range 0 to 10 000 ppm Methane Accuracy 50 ppm Methane Audible Vibration Visual Indicator Features 1 Year Warranty Audible Tick (85dB) and Vibration Alert Auto Zero Calibration Five Red LEDs Display Threshold Levels of Measurement Tri Mode Detection CE Certified