gas detector: 1)Unit: ppm, mA, %,%LEL%VOL 2)Humidity: 10-95% ... )Failure signal: 3.6mA Smart 4-20ma combustible gas leak detector with lcd display and alarm Technical features:1) 4-20mA ... units. 10) Automatic temperature compensation ensure the correct measurement. gas detector Thchnical data:1) Power supply: 24VDC (10.5 ~ 45 VDC ... gas , 316SSL for other gases 16) IP rating: Ip66 gas detector