Portable Handheld Natural Gas Leak Detector Combustible Gas Alarm Detector Product Introduction: This product is a portable combustible gas detector used toquickly and reliably detect the presence of combustible gases inthe air and to check if there is a combustible gas leak. It candetect most combustible gases that contain carbon, such asnatural gas, liquefied petroleum gas,methane, ethane, propane,carbon monoxide, etc. Using The Product: 1.Before using this device, press the power button to turn it onThedevice is in a clean air environment. 2.Start preheating immediately after the device is turned onGassensor and concentration indicator flashingDown. The deviceemits sound'di di 'indicates that the preheating process has beencompleted. 3.After preheating the sensor, bring the device to the designatedlocation You need to detect flammable gases there. 4.Then move the sensor head closer to the possible locationlt maybe a combustible gas leak. lf the device detects combustible gasNumber and frequency of concentration indicator stripsThe alarmsound will increase with the increase of gas concentration Increase. 5.After use, press the power button to turn off the device. Specifications: Product name:Gas leak det ector Sensor type: semiconductor Sensor warm-up time: about 30 seconds Detection range: 50-1000 ppm(methane) Response sensitivity:<50 ppm(methane) Response time:5 seconds (≤500 ppm)or 2 seconds (>500 ppm) Alarm mode: analog display & audible alarm Power supply: 2xAAA alkaline battery(Not included) Operating environment: 0'C to 50“C/50 °F to 122 °F,20%-80% RH Storage environment: -10'C to 60“C/14°Fto 140°F,20%-80% RH Detectable gases: Natural gas, liquefied petroleum gas (LPG), carbon monoxide(CO)methane(CH4),ethane(C2H6), propane(C3H8), ethylene(C2H4)propylene (C3H6), acetylene (C2H2), propyne (C3H4), etc. Package includes: 1*Gas leak det ector(Batteries not included)