Thermal characterization of epidermal RFID sensor for skin temperature measurements

The measurement of skin temperature is essential in both thermo-physiological and clinical applications as well as for sport medicine. The jointed development of Epidermal Electronics systems and UHF RFID technology for skin applications originates novel solution for the wireless passive sensing of body temperature. In this paper the thermal characterization of a small size (2.5cm × 5cm) epidermal RFID thermometer is addressed. After unifom recalibration, the accuracy of the RFID sensors results below 0.25°C while the response time is equal to 4.3 sec, thus enabling the reliable monitoring of surface temperature under both static and dynamic conditions.