manufacturers, AMETEK-Solatron ISA and ABB both offer wedge meters.
meters consist of a flow body and a smooth wedge-shaped restriction in the
tube which creates a pressure drop as the flow passes through it. Wedge
meters measure differential pressure in liquids, gases, or steam.
have no moving parts, making them virtually maintenance-free. They
generally give highly accurate readings and can handle low flows, highly
viscous flows, dirty or corrosive flows, and hot or cold flows, with only a
small reduction in the overall pressure of the flow.
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