Paddle Wheel Flow Meter, which is easy to operate and gives accurate and reliable measuring of flow. The flow and the revolutions of the paddle wheel are proportional to each other. Thus, by spinning the paddle wheel with the force from the flowing fluid, it becomes possible to measure the rate of this flow from the number of revolutions. A paddle wheel  flow meter is used for volumetric total flow and/or flow rate measurement since it has a relatively simple working principle. When fluid flows through the turbine meter, it impinges upon turbine blades that are free to rotate about an axis along the center line of the turbine housing. The angular (rotational) velocity of the turbine rotor is directly proportional to the fluid velocity flowing through the turbine.