Material:Stainless steel Output signal:4-20mA or RS485 Ex-proof grade:Ex dIICT6 GB IP grade:IP66 Sensor:Catalytic and electro-chemical sensor working temperature:-20~60 degree Detected way:Natural diffusion Usage:Combustible gas, toxic gas and oxygen gas detection Size of external carton:27*23*13cm Warranty:Free calibration and free warranty within a year Show More