This Digital Thermometer is designed with permanent probes and high-resolution digital display. The probe of this thermometer is coated with a plastic and round metal tip. It is considered as a highly sensitive temperature sensing device. Working of this thermometer depends on resistance temperature detector (RTD), thermocouple or thermistor sensors. Tip of the thermometer is inserted into patient's mouth under the tongue. The offered thermometer is a small and portable hand-held device for taking an oral temperature. Also, this Digital Thermometer measures body temperature within a few seconds.