Aplus Finetek announces EPR series of paddlewheel flow meter by from on 2017-05-11 16:14 (#2P4DG) Using magnetic paddlewheel technology and electronics, the EPR continuously measures the flow of liquids in pipes with a velocity range of 0.98ft/s~32.8ft/s (0.3m/s~10.0m/s) in pipe sizes from 3/4" through 2" (DN20 to DN50).