... failure phenomenon, small size, easy to install.7.sensor protection.Stainless steel sensor probe part, play the role of anti-corrosion ... controller Detection range :12-15 square, combustible gas catalytic combustion sensor (% LEL), toxic gases using electrochemical sensors (ppm, 10ppm). ... 3, water vapor, and more water droplets ≥ 95% RH (relative humidity);4, the temperature at -40 °C or 65 °C place ...