FIELD: medical engineering. SUBSTANCE: device has additional shielding electrode mounted between cathode and anode of transducer applied to skin. The electrode envelopes the cathode and is manufactured from the same metal as the anode. The shielding electrode makes contact with skin like cathode and anode and is electrically connected to anode in a way that it has anode potential. Polarograph unit for processing and recording useful signal is mounted in anode circuit. EFFECT: real time non-invasive measurement of oxygen concentration. 2 cl, 5 dwg
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