I. Technical specifications Dimension: 2000mm×600mm×1800mm Power: 220V, 200W Valve as local resistance in the pipe (or with sudden enlargement, a sudden shrinkage) as object, the manometer was used to measure water flow in the pipe valve before and after the pressure difference between the various points accordingly, master the test method of local resistance coefficient calculation. I. Main configuration Experimental stage desk, organic glass rectifier voltage stabilizing water tank, three different pipe diameter of the experimental section, PVC plate storage tank, low noise anti-corrosion pumps, apply pressure tube, The adjusting valve group, Measuring pressure plate, measuring tank, the APS and return pipe on the pipe, etc. Type II increase traffic acquisition sensor 1 set, 3 sets of differential pressure sensor, temperature sensor, the universal signal input inspection instrument, software, etc.