How does turbine flow meter working principle work? It associates the velocity of the fluid with the speed of the rotor. Clean fluid passing through the turbine flow meter causes the blades to rotate. The magnet inside senses the rotation of the rotor, which produces an electric signal. This electronic signal is then processed by the electronic circuitry to determine the flow rate and... https://www.pcd-flowmeter.com/flow-meter/turbine-flow-meter-manufacturers