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The
World Market for Primary Elements
Released
in September 2007
About Wedge
Meters
Among other
manufacturers, AMETEK-Solatron ISA and ABB both offer wedge meters. Wedge
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. 
They
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. Both
Solarton and ABB's offerings are designed to be bi-directional, and come in
standard sizes from 0.5 or 1 inch to 24 inches in diameter. Both Solartron
and ABB claim measurement accuracy of ±0.5% of
rate.
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