Differential measurement probe for measuring temperature on e.g. tubes in air conditioning application, has probe body whose threaded part is terminated by metal pellet that is in contact with tube when probe is positioned

摘要

The probe (1) has a probe body comprising a threaded part so as to be screwed on a metal or plastic collar fixing model, where the body is formed from non metallic and non-heat conducting insulation material. The threaded part of the body is terminated by a metal pellet that is in contact with a tube when the probe is positioned. A temperature sensing element moves to an end of the threaded part and contacts the pellet to ensure a thermal connection between the tube and a sensor contained in the body. Metal beads (2) surround the sensor. The temperature sensing element is chosen from a negative temperature coefficient thermistor, positive temperature coefficient thermistor, nickel or platinum resistor, silistor, thermocouple and transistor.