Water Cut Meter Principle

Water cut meters using Radio Frequency (RF) Admittance are widely successful because of the large difference between the dielectric constants of oil and water.

Water Cut Meter


As the amount of water in the flowing oil increases, the net dielectric of the fluid increases, which causes the capacitance to increase.

The onboard electronics can then compute the relationship between capacitance change and water cut.

ref - halliburton