... . Ex d II CT5 TGas-1031 h2s detector & so2 gas detector & nature gas leak detector TGas-1031 Series Combustible, Toxic and Harmful ... loses the function of monitoring alarm because of ageing, the detector is capable of automatic recognition and alarm, so as to ... control modeBy the adjustment mode by infrared remote control, the detector can be adjusted without opening of cover4-20mAoutput4-20mA output ...