FIELD: measurement technology. SUBSTANCE: device for measuring electrochemical potential of subsurface structures has probe, comparison electrode and auxiliary electrode, data retrieval and storage unit incorporating analog switch break and make contacts, two operational amplifiers, transistor, measuring capacitor, push-button switch, current generator built around transistors, resistance divider built around resistors, and also microammeter connected to structure under test, push-button switch, pulse generator, recording instrument. Electrodes are made as two isolated metal strips mounted on insulated metal rod of probe. EFFECT: improved validity of measurement results. 1 dwg
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