EPR Paddle Wheel Flow Meter mainly by using the principle of rotating blades to measure flow. Mainly by the middle of the leaf blade and the leaf blade capacity calculated. In the structural design of the product, Leaf blade need to be able to satisfy a sufficient change in the linear velocity 0~10m/s. Its apparent volume miniaturization design. Within the range of performance requirements, It can not produce a total shock to let the speed is reduced. The sensor requires actual measurement to get real flow signals, Elimination of bearing、Axial friction coefficient error and the leaf blade resistance error etc. Calculate the K value read. The company's flow test equipment, Testable 10mm~300mm mouth Diameter flow sensor.