H2S gas detector 1. Smart sensor technology 2. Long range ... 3. LCD display 4. Anti-proof design ATEX diffusion type h2s gas detector for toxic gasThis Toxic gas detector with LED ... Gas Combustible gas, VOC (Certain Organic Vapors),H2(ppm),CO,H2S,O2(VOL),NH3(ppm), Cl2,NO, CO2 Working condition temperature ... 10%~93%RH(incondensable); pressure range:86~106kPa ATEX diffusion h2s gas detector for toxic gas