Using Ultrasonic Oscillating Temperature Sensors (UOTSes) to Measure Aggregate temperatures in Liquid and Gaseous Media

An ultrasonic oscillating temperature sensor (UOTS) features a pair of ultrasonic transducers and an amplifier, which compensates for the energy losses in the signal pathway. An UOTS oscillates with frequency, which is related to the ultrasound velocity in the medium between the transducers, which, in turn, depends on the medium’s temperature. In this paper, we discuss our past experiments with UOTSs in aqueous media and the initial results of a feasibility study on the use of an UOTS in air.