... anti-alkaline, anti-impurity no movable part0.2% remote control lard flow meter (ISO 9001) LCD display,flowmeter,flow indicatorRXDC differential ... volumetric, vane-wheel, by-pass, orifice, differential pressure flow meter. It was widely used in fields of gas, natural gas ... (only for separate digital tube)Output formsSite display reading; 4~20mA (2-wire system); pulse; 0~10V; RS232/RS485 (optional);HART ...