Flow Meter / Rota Meter :-
The rota meter is an industrial flow meter used to measure the flow rate of liquids and gases. The rota meter consists of a tube and float. The float response to flow rate changes is linear, and a 10-to-1 flow range or turn down is standard. In the case of rota meters, far greater flexability is possible through the use of correlation equations. The rota meter is popular because it has a linear scale, a relatively long measurement range, and low pressure drop. It is simple to install and maintain.