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Differential (Head) Meters

The basic concepts of differential meters have been known for several centuries, and are outlined in this chapter. Their advantages are that they are simple, inexpensive, their calibration can be inferred from their mechanical construction, they are available in most sizes, easy to maintain, rugged, widely used and accepted, do not require power, and they can be built with special materials. Details of the design of orifice meters, Venturi meters and other head meter types are given here.

Industry standards define the important parameters of head meters, particularly orifice meters. However, established standards can be changed because of new test results. Flow measurement practitioners must keep up to date with ...

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