... meter (Good quality,low price)Specifications:A,SBL digital flow meter,intelligent flow meter,gas flow meter,liquid flow ... Measurement flow of liquid, gas, steam, ropy mediums or ambulatory mediums in low, normal or high temperature ... Nominal Diameter:6-4000mmNominal pressure:-0.1+70MPaTemperature:-196°(low temperature type)-40°~ +70°(normal temperature),-40°~ ... Air flow meter (Good quality,low price)