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 September 28, 2021

8/5/2004 - Flow
Flow devices used in controls is generally in two categories:

Water Flow
Air Flow

A simple water flow switch with a paddle is a common device used to prove water flow in pipes in order to prove flow to activate a boiler or chiller. Flow transmitters with small pinwheels are used to measure the flow in GPM.

Similar flow devices are used in air flow applications however pressure differential switches and transmitters to determine air flow are desirable because they can rely on the air pressure instead of physically impeding the air stream.

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