| 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.
 
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