Orifice meters offer the lowest installation cost of our subsonic meters but have the highest overall pressure loss. They offer excellent repeatability. The installation requirements are more stringent that for a subsonic Venturi or ASME Flow Nozzle.
A complete metering system includes a subsonic meter, meter run, and both pressure and temperature sensors. Flow calculations can be performed by a Rosemount 3095MV™ transmitter or with most any computational device such as a Flow Systems FC500 Flow Computer.