FIELD: physics.
SUBSTANCE: in the method of determining temperature of a measuring sensor for measuring concentration of oxygen in gas mixtures, mainly in exhaust gases of internal combustion engines, the output voltage of a Nernst measuring element (12) which corresponds to oxygen concentration is analysed; temperature of the measuring sensor is changed such that it is equal to the working temperature using a heating device (50); internal resistance of the Nernst measuring element (12) is determined in a first temperature range and then used to determine temperature of the Nernst measuring element (12); internal resistance of the heating device (50) is determined in a second temperature range and then used to determine temperature Nernst measuring element (12).
EFFECT: invention increases temperature measurement accuracy.
9 cl, 5 dwg
