1.water flow meter,water level meter 2.no movable part,1.0%0.5%0.2% ... 20mA,RS485 4.support remote control water flow meter (LCD display),water level meterSBL digital target flow meter is ... able to measure very low velocity below 0.8m/s.No movable part, safe and reliable.Wide measure range, bigger ... range can be changed by replacing target according to need. LCD display.4-20mA, 0-10V, impulse, and RS485 ...