Compression spring thermocouple is a common thermocouple with unique design, compact structure, accurate measurement, and wide application. The main feature of this thermocouple is that it contains a pair of thermocouple wires made of different materials inside. When one end of these two wires receives heat, they produce a thermoelectric effect, thereby generating an electromotive force. The magnitude of the electromotive force is proportional to the amount of heat received.
The construction design of the pressure spring thermocouple is clever, with the thermocouple wire fixed on a bracket made of insulating material, which is connected to the outside through a pressure spring. This design enables the thermocouple to closely adhere to the object being measured, thereby more accurately measuring the temperature of the object. At the same time, the elastic structure of the compression spring can reduce the contact thermal resistance between the thermocouple and the measured object, thereby reducing measurement errors.
The measurement accuracy of a spring-loaded thermocouple largely depends on the material selection of the thermocouple wire. Usually, the material of thermocouple wires is precious metals such as platinum, copper, etc., because these metals have good stability and high-temperature characteristics, which can ensure measurement accuracy. In addition, the diameter and length of thermocouple wires can also affect the accuracy of measurements, and usually require precise machining and calibration to ensure their measurement accuracy.
The use of spring-loaded thermocouples is very convenient, just fix one end on the measured object and connect the other end to the measuring instrument. Due to its compact design, it can be directly installed on various small devices or pipelines without the need for additional brackets or pipelines. At the same time, the characteristics of high temperature resistance, corrosion resistance, and vibration resistance of spring-loaded thermocouples also enable them to work stably in harsh environments such as high temperature, high pressure, and high corrosion.
In summary, the spring-loaded thermocouple is a compact, accurate, and easy-to-use thermocouple that is widely used in various temperature measurement applications.