What are the advantages of Clamp on ultrasonic flow measurement?

Advantages of Clamp-On Ultrasonic Flow Measurement

1.Low installation effort and costs 2.Measurement is independent of fluid conductivity and pressure 3.No pressure loss,no possibility of leakage 4.Retrospective installation for existing plants possible. 5.No cutting of pipes necessary,no interruption of process,no plant shutdown 6.No additional fittings for maintenance required.