Ultrasonic thermometer

摘要

An ultrasonic thermometer comprising a probe which is coupled to a magnetorestrictive transmitter and has discontinuities to reflect for each ultrasonic pulse applied to the probe a multiplicity of echoes of which the detection provides a measure of the ambient temperature of the probe. The probe is disposed in a tubular jacket. The probe and the jacket are separately anchored at respective ends, which may be proximate or remote, so that substantially all the probe moves relative to the jacket to rupture bridges or welds which may be formed between the probe and the jacket.