Classification of specifications of platinum-iridium thermocouples

Platinum rhodium thermocouples measure temperature and tolerance

Platinum rhodium thermocouple models and specifications

The principle of temperature measurement of platinum-iridium thermocouple: when two different kinds of metal conductors are respectively connected together to form a closed loop, when the two nodes are distorted, current flows in the conductor loop, and a thermoelectric potential is generated. This phenomenon is called the thermoelectric effect. Use this effect. As long as you know the junction temperature at one end, you can side out the temperature of the other end node. The fixed temperature node To is called the reference point (cold end), constant at a certain standard. Temperature; the side temperature node is called the side temperature point (hot end). Because the platinum-iridium thermocouple is used as the temperature measurement sensor in the side temperature field, it is usually used together with the temperature transmitter, regulator and display instrument to form the process control. System, platinum-rhodium thermocouples are used to directly measure or control the temperature of fluids/steam and gas media and solid surfaces in the range of 0-1800 °C in various production processes.
Zhongneng Instrument Experts said that the characteristics of platinum-iridium thermocouples are remarkable: they have the highest accuracy, the best stability, wide temperature range, long service life and high temperature limit. They can be applied to oxidizing and inert atmospheres. It can be used in vacuum for a short time, but it is not suitable for reducing atmosphere or containing metal or non-metal vapor atmosphere. Therefore, platinum-ruthenium thermocouple can be widely used in powder metallurgy, sintering bright furnace, vacuum furnace, smelting furnace, glass, refining. Temperature measurement in steel furnaces and ceramics and industrial salt bath furnaces.