FIELD: measuring devices. SUBSTANCE: device has sensor, which is designed as cylinder which is made from solid dielectric material. In its housing disk and ring electrodes are mounted. Electrodes are connected to voltage recorder. Disk electrode is connected through serial circuit of current recorder and variable resistor to power supply. Technological process power supply is used as power supply for device. EFFECT: increased functional capabilities. 1 dwg, 1 tbl
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