FIELD: measurement technology, measurement and test of electric physical properties of liquid technological media. SUBSTANCE: liquid semiconductor medium is placed in accordance with invention into variable electromagnetic field and one parameter of electromagnetic field is measured and used to make decision on conduction. Electromagnetic field is excited in the form of slow wave, damping value of such wave is measured and employed to evaluate conduction of semiconductor medium. EFFECT: increased sensitivity and accuracy of test of relatively little conduction of liquid technological media. 2 dwg
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