AbstractThin‐layer transducers, which are mainly used for the measurement of the EHD contact parameters, have to be attached to an isolating layer separating it from the steel roller. The isolating layer, made of SiOxor Al2O3,disturbs heat flow in relation to the real contact. This paper presents a solution for the system of two heat conduction equations for a two‐layer body: SiOx‐steel. The boundary conditions reflect the real situation during the measurements carried out by means of these transducers. The solution was obtained for an assumed temperature distribution of the isolating layer surface. Computation results for two different temperature distributions of the surface and for various values of the SiOx‐layer thickness are also pr