... Gas Detector/Transmitter, 1.New IR CO2 sensor, optional range:0-20000ppm,0 ... Description high precision, good linearity, stable performance with infrared remote control explosion-proof design segment digital displaysolid structure, ... combustionMeasuring range0-100%LELResponse time<30 secAccuracy±2% / Full scaleAlarm typevisual, sound,vibrationRemote controlInfrared remote control adjustment ...