A temperature transducer refers to a sensor that can sense temperature and convert it into a usable output signal. temperaturesensoryesTemperature measuring instrumentThe core part has a wide variety of varieties. According to the measurement method, it can be divided into two categories: contact and non-contactSensor materialandelectronic componentCharacteristics are divided into thermistor andthermocoupleTwo categories.
Sensors designed based on the principle of metal expansion
Metals will undergo a corresponding extension after changes in ambient temperature, so sensors can convert this reaction into signals in different ways.

Bimetallic sensor
bimetal stripComposed of two pieces of metal with different coefficients of expansion stuck together, material A expands more than the other metal with temperature changes, causing the metal pieces to bend. The curvature of curvature can be converted into an output signal.

Bimetallic rod and metal tube sensor
As the temperature increases, the length of the metal tube (material A) increases, while the length of the non expanding steel rod (metal B) does not increase. Therefore, due to the change in position, the linear expansion of the metal tube can be transmitted. Conversely, this linear expansion can be converted into an output signal.

Sensors for designing deformation curves of liquids and gases
When the temperature changes, both liquids and gases will experience corresponding changes in volume.
Multiple types of structures can convert this expansion change into a change in position, resulting in a change in position output (potentiometer, induction deviation, baffle, etc.)