The working principle and application of platinum and rhodium thermocouple
The working principle and application of platinum and rhodium thermocouple
Platinum and rhodium thermocouple use temperature of -200 ~ 1300 ℃. Platinum and rhodium thermocouple has the advantages of good linearity, high thermoelectromotive force, high sensitivity, good stability and uniformity, strong oxidation resistance, low price, no short-range order effect, and its comprehensive performance is better than K Type thermocouple, is a very promising thermocouple. N-type thermocouples can not be used directly at high temperatures for sulfur, reducing or reducing, oxidizing alternating atmospheres and in vacuum.
Platinum and rhodium thermocouple is composed of two different components of the conductor at both ends of the circuit into the loop, when the two junction temperature is different, it will generate heat in the circuit. If there is a temperature difference between the working end of the thermocouple and the reference end, the display instrument will indicate the temperature value corresponding to the thermoelectric potential generated by the thermocouple. The thermoelectric heat of the platinum and rhodium thermocouple will increase with the increase of the temperature at the measuring end. Its size is only related to the temperature of the thermocouple material and both ends, regardless of the length and diameter of the hot electrode. Various platinum and rhodium thermocouple shape often due to the actual needs of the scene and the shape is not the same, but their basic structure is roughly the same, usually by the thermal electrode, insulation sleeve protection and junction box and other major components.
Platinum and rhodium thermocouple is widely used in powder metallurgy, vacuum furnace, smelting furnace, steel furnace, industrial salt bath, sintered bright furnace and other industrial production, usually with the temperature transmitter, regulator and display instruments supporting the use, The process control system is used to directly measure or control the temperature measurement in various production processes.
Platinum and rhodium thermocouple for a variety of high-temperature occasions in the production process, widely used in powder metallurgy, sintering bright furnace, vacuum furnace, smelting furnace, glass, steel and ceramic and industrial salt bath furnace temperature.
The above is the platinum and rhodium thermocouple working principle and application of a brief introduction, hoping to help you better understand the use of platinum and rhodium thermocouple matters needing attention.
