Radiofrequency resonator for measuring physical properties of liquids

Radiofrequency (RF) resonator measuring device for determination of physical properties of liquids has been proposed. The device contains RF sensor that is a section of modified coaxial line with U-shaped inner conductor. Distant location of electronic unit of the device from a monitored object can be provided. Mathematical model of the RF sensor has been proposed. It gives ability to calculate output characteristic of the device and to optimize parameters of the RF sensor in order to increase its sensitivity to measured physical properties of a liquid and to provide unambiguity of measurement results.