This project will focus on the thermometric calibration of the heating effects by the 27.12 MHz Mettler Diathermy system on non-hardening clay with digital thermometer of plastic probe for use in Hyperthermia system for the treatment of cancer. The non-hardening clay is chosen so that the electrical properties are identical to the biological human tissue. The experimental study on the Mettler diathermy system will include the adjustments of the head of the applicator and different sizes of clay medium. Our goal would be to achieve the temperature of the treatment within the desired time and to improve the conditions of the experiment and to be more efficient and accurate with the temperature measurements with respect to time.