World Market for Primary Elements
in September 2007
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.
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