... and can take place of them, such as turbine, electromagnetic, ultrasonic, mass, volumetric, vane-wheel, by-pass, orifice, differential pressure flow ... .6V Li batter; external power supply of 24VDC; 220VAC (only for separate digital tube)Output formsSite display reading; 4~20mA (2 ... shall execute GB/T9115.1~9115.4~2000 series standard. For pipeline type, small diameter flowmeter of DN6, DN8, DN10 etc ...