FIELD: agriculture.
SUBSTANCE: device contains a generator of electromagnetic oscillations with a tunable frequency 1, a sensor made in the form of a circular waveguide cavity 2, a detector 3, connected with its output to the input of measuring set of amplitude-frequency characteristics 4, and indicator 5. At that, the sensor is made in the form of a circular waveguide cavity with a coaxial cylindrical metal partition at each end, and one end of the waveguide is additionally closed with a dielectric plate.
EFFECT: increased accuracy of measurement and exclusion of sensitivity to adhesion.
1 dwg
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