PGas-21 Series Single Gas Detector has high sensitivity and high accrancy, it is suitable for the detection of many kinds of toxic and harmful gases. The instrument adopts advanced 16-bit microcontroller with extra low power consumption and quick processing speed. It is firm and durable with the anti-skid design of shell. It is widely used in petroleum, petrochemistry, chemical industry, gas, coal, metallurgy and power system; safety detection in municipal administration, communication and traffic tunnel construction; electronics and semiconductor industry and other places where toxic and harmful gases exist. Technical parameters Parameter: Characteristics Measuring gas: Combustible gas, toxic and harmful gas, refer to lectotype table for details Sampling Method: Diffusion, Pump sampling Measurement principle of sensor: Electrochemical (oxygen and poisonous gas), catalytic combustion (combustible gas) Range : Refer to lectotype table for details Alarm indication : 90dB variable sound vibration alarm, overrange, alarm against insufficient quantity of electricity Response time: (CO, H2S, SO2, CL2, NO, CLO2, NO2