There are several types of flow meters used to measure the flow profile of a fluid. They are; turbine flow meters, ultrasonic flow meters, magnetic flow meters, Coriolis flow meters and target flow meters.
Duke Energy uses a GE Frame 5 gas turbine to drive a compressor used in a natural gas pipeline. The intake system required retrofitting with a silencer to meet current regulations and the need also existed to reduce particle contamination. The pressure drop in the initial design was found to be 8.5 inches of water, much higher than the design specification which was 5.3 inches.