How does a thermocouple thermometer work?
The initial thermocouple thermometers used simple metal or alloy wires, and with the continuous development of technology, thermocouple thermometers are also constantly being improved and perfected. Nowadays, thermocouple thermometers have been widely used in industrial production, scientific research, environmental protection and other fields. It has the advantages of high accuracy, wide measurement range, simple structure, and convenient use, and is one of the commonly used tools for measuring temperature.
Temperature is one of the important parameters that need to be measured and controlled in industrial production processes. In temperature measurement, the application of thermocouples is extremely extensive, as they have
It has many advantages such as simple structure, convenient manufacturing, wide measurement range, high accuracy, low inertia, and easy remote transmission of output signals. In addition, as thermocouples are passive sensors that do not require an external power source for measurement, they are very convenient to use and are often used to measure the temperature of gases or liquids in furnaces and pipelines, as well as the surface temperature of solids.
Thermocouple thermometers use the thermoelectric effect to measure temperature. The core principle is that when conductors A and B of two different materials are welded together, if the temperature of the joint is different, an electromotive force will be generated in the circuit, which is called the thermoelectric effect.
classification
Commonly used thermocouples can be divided into two categories: standard thermocouples and non-standard thermocouples. Since January 1, 1988, all thermocouples and thermistors in China have been produced in accordance with IEC international standards, and seven standardized thermocouples, namely S, B, E, K, R, J, and T, have been designated as unified design thermocouples in China.
The K-type thermocouple is currently the most widely used and widely measured thermocouple in the market. It usually consists of temperature sensing elements, installation and fixing devices, and junction boxes, among other main components.
