Variable Area Flow Meter

Definition - What does Variable Area Flow Meter mean?

Variable area flow meter is a device that measures the flow of fluid and gasses by allowing the cross-sectional area of the device to vary in accordance with the flow, which causes some measurable effect indicating the rate of flow. It is a very simple yet versatile flow measurement device. It is an upright tapered measuring tube that is wider at the end; it is shaped such so that the float can move freely up and down for the measurement.

Petropedia explains Variable Area Flow Meter

The operating principle of variable area flow meter is a flowing fluid or gas changes the position of the float (piston or vane) to open a large area for the fluid to pass. The exact position of the float determines the direct visual indication of the flow rate. This meter is available in 3 different type’s Plastic variable flow meter that is a cost-effective solution for non-corrosive and low-pressure applications, Glass variable flow meter that is suitable for wider flow range and gas measurements, Metal variable flow meter which is beneficial for use in high/low pressure and temperature.