FIELD: instrument industry.
SUBSTANCE: device comprises electrode unit made for permitting receiving the material to be investigated, multi-frequency generator connected to the electrode unit and made for permitting supplying tree or more signals of different frequencies, pickup connected with the electrode unit and made for permitting it to determine the value of capacity of the electrode unit for each of three or more frequencies, and source of reference signal.
EFFECT: enhanced precision.
43 cl, 2 dwg
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