FIELD: measurement of electromagnetic, optical, tempo, radiation and other physical fields formed by various technological processes and employment of domestic equipment. SUBSTANCE: in accordance with process dependence of resistance of liquid with ordered structure of associates not subject to action of measured field on value of flowing measurement current at which change of resistance of liquid starts is measured and measurement current below threshold value at which change of structure of associates under action of measurement current takes place is set. Then liquid is subjected to action of external measured field and change of conduction of liquid is measured and used to evaluate value of measured field. Gear for implementation of process includes measurement and test dishes with deionized water and electrodes located in it, generator of measurement signal, measurement amplifier and indication aid. Both dishes have common electrode connected to input of amplifier with input current not higher than 10-10 A. Generator of supply voltage has two antiphase outputs connected to opposite electrodes of dishes and controllers of current passed through dishes and measurement amplified is linked to input of synchronous detector coupled to indication aid. EFFECT: increased sensitivity and accuracy while measuring intensities of weak physical fields. 2 cl, 1 dwg
