Biggest Gas Detecting Instruments Supplier in China, Most Competitive price and ISO9001:2000, MA ... any Energy source of power supply. (3)It features in simple operation and portability. (4)It can detect different ... toxic gases in the air including CO,CO2,H2O,H2S,NH3,PH3, ... SO2,C4H10,CH3Br,C2H3CL, CL2, HCN,HCL,HF,NO,NO2over 600 types of target gas can ...