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Metal materials will produce a corresponding expansion after the working temperature changes, so the temperature switch can perform signal conversion for this reaction in different ways. The resistance band temperature control switch resistance band is composed of two metal materials with different thermal expansion coefficients stuck together. As the temperature changes, material A expands more than the other metal material, causing the copper sheet to bend. The bent refractive index can be converted into an output data signal.

As the temperature of the bimetallic rod and metal hose temperature control switch increases, the length of the metal hose (material A) increases, while the length of the non-expanding steel rod (metal material B) does not increase. In this way, due to the change in position, the linear expansion of the metal hose can be transmitted. Instead, this linear expansion can be converted into an output signal.

When the temperature of the temperature switch designed with the deformation curve of liquid and gas changes, the liquid and gas will also produce corresponding changes in volume. Various structures can convert this change in expansion into a change in position, which in turn generates a change in position output (sensors, magnetic field error, fenders, etc.).

As the temperature of metal changes, its resistance also changes. For different metal materials, the resistance value changes differently every time the temperature changes by one degree, and the resistance value can be directly used as an output signal. There are two types of changes in resistors: Positive temperature coefficient: temperature rise = resistance value increases; temperature decrease = resistance value decreases; Negative temperature coefficient: temperature rise = resistance value decreases; temperature decrease = resistance value increases.

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