A method for direct measurement of the adiabatic temperature change inside the active region of multilayer ceramic (MLC) components without detailed knowledge on geometry and properties of inactive regions in the MLC is reported. Thin thermocouple wires serve as the temperature sensor with sufficiently small response time with regard to the relaxation time into the inactive regions. They are mounted on top of the MLC by resistance welding. The accuracy of the method is estimated using finite element analyses of the measuring setup. Experiments are used to validate the numerical analyses as well as the proposed measuring method. In its current implementation the method reaches an accuracy of almost 90 %, which can be improved to approximately 97 %. Therefore, neither fitting nor correction is required.