... Output:4-20mA current 4.Interface:RS-232 output water flow meter RV-100H handheld ultrasonic flowmeter for various ... unlockingDisplay4 lines English characters on-screen display instantaneous flow, velocity,, cumulative flow, signal status working hours and so on ... PVC, FRP and other uniform dense quality pipeLiquid typeswater, sea water, sewage, alcohol, various oils such as uniform, single, ...