Water Fraction Measurement Using a RF Resonant Cavity Sensor

Heron Eduardo Ávila, Daniel Juan Pagano, Fernando Ragel Sousa

Abstract

We have tested the working principle of water fraction measurement using a Radio Frequency (RF) resonant cavity sensor. This technology allows us to determine the water fraction by the frequency shift of the first resonant peak in a non-intrusive way. The sensor operates with low power signals (1 mW) in the range of 100 through 400 MHz. Static measurements were done using a Scalar Network Analyzer (SNA) for water/oil and water/air static mixtures with fresh water and sea water. The measurement’s uncertainty and the characteristic curves of the sensor’s behavior were computed.

Keywords

water fraction measurement, resonant cavity sensor, radio frequency

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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