... .3.With Remote Control. You can calibrate the detector without opening cover.4.Adopts imported sensor with high ... DC24V)Detection principleCatalytic / Electrochemical /Infrared/PIDWorking voltageDC14V~35V( detector terminal)Communication modeHBUS Contact rating 2A/DC24V Install screw thread ... diffusion Detection Gas Combustible gas, VOC (Certain Organic Vapors),H2(ppm),CO,H2S,O2(VOL),NH3(ppm), Cl2,NO, ...