... ,oxygen gas,nitrogen, coal gas,natural gas,methane and other chemical gas.Liquid: water,high-temperature water,oil,food liquid ... ,chemical liquid.Steam: saturated vapor,superheated steam. Medium temperature Plug-in& ... -proof type: d BT4Intrinsic error Plug-in type: ±2.5%DC supply +3.6V, +12V, +24V (Field data show the supply ...