gas meter,gas meter,Co gas flow meter,flowmeter: No movable part:0.5% 4~20mA,remote control 6~4000mm gas meter,air flow meter,flowmeter:industrial use,all gas, natural ... , electromagnetic, ultrasonic, mass, volumetric, vane-wheel, by-pass, orifice, differential pressure flow meter. It was widely used in fields of gas, natural gas, petroleum ...