... ,2.it is suitable for the detection of many kinds of toxic and harmful gases.3.The instrument ... to lectotype table for detailsSampling MethodDiffusion, Pump samplingMeasurement principle of sensorElectrochemical (oxygen and poisonous gas), catalytic combustion (combustible ... sound vibration alarm, overrange, alarm against insufficient quantity of electricityResponse time(CO, H2S, SO2,CL2,NO, CLO2 ...