FIELD: instrumentation. SUBSTANCE: device has generator 1 of rectangular pulses with quartz-controlled stabilization of frequency and phase of oscillations fitted with former 2 of forward and counterphase relative pulse duration, capacitive converter 3 carrying dish with tested substance 3 between its plates, second capacitive converter 4 carrying dish with standard sample 5 between its plates, adder 6 and register 7. EFFECT: simplified design, increased operational reliability. 1 dwg
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