The venturi meter is the favoured device for wet gas flow metering. The simplicity of no moving parts makes the venturi meter maintenance free and the dependability allows it to be used in applications with higher turndown rates and/or lower pressures drops.
The Positive Displacement meter, like the turbine meter has been the traditional method of metering for the last six decades.
Gas ultrasonic metering systems provide a space and weight saving solution for gas metering and it is developing as the preferred metering technique for offshore gas production installations.