... gas, super - the oxadation hydrogen, flue gas, marsk, butane, and chlorine...etc.. The flow meters are applicable to the following ranges ... :l Diameter ,Φ15~Φ2000mm or bigger.l High and low temperature, -196°C~+450°C ... flow of liquid, gas, steam, ropy mediums or ambulatory mediums in low, normal or high temperature condition.l Total quantity measurement accuracy ...