Variable area meter
Encyclopedia
A variable area meter is a meter that measures fluid flow by allowing the cross sectional area of the device to vary in response to the flow, causing some measurable effect that indicates the rate.
A rotameter
is an example of a variable area meter.
A rotameter
Rotameter
A rotameter is a device that measures the flow rate of liquid or gas in a closed tube.It belongs to a class of meters called variable area meters, which measure flow rate by allowing the cross-sectional area the fluid travels through to vary, causing some measurable effect.-History:The first...
is an example of a variable area meter.