Description NOTE: 1.Measure the following gas:methane,natural gas,carbon monoxide,gasoline,alcohol,propane,benzene,trichloroethane,ethane,n-butane,halogenated hydrocarbon. 2.The screen can only display the gas concentration, not the gas type 3.Gas unit display: only LEL Selling points of CGD02: Display:LCD Display Measuring range:0~100%LEL Tolerance scope:+-5% Resolution:1%LEL Alarm value setting:high and low two points freely set Concentration alarm value:adjustable Temperature range:-10~50C Temperature error:+-1.5CS Other Function: Product type:digital display concentration(CGD02) Preheat time:le than 30 second Alarm mode:audibel+vibration prompt(CGD02) Sampling method:diffusion type Operating hours:more than 1 hour Maintenance We provide 3 months free maintenance. The buyer should return the product in the original conditions to us. If any part is required to be replaced, the buyer should also pay for the costs of the parts to be replaced. Before returning the items, please confirm the return addre and the logistics method with us. After you give the items to the logistic company, please send us the tracking number. As soon as we receive the items, we will repair or exchange them ASAP. Special Demand If you have any special demands, pls leave a meage to us in your order. Feedback If you are not satisfied with our products or service, please feel free to contact us, we will try our best to solve your problem Please do not leave negative feedback without any communication. Thanks for your understanding in advance Returnfund About our company