High temperature platinum rhodium thermocouple temperature sensor

High temperature platinum rhodium thermocouple temperature sensor as a kind of traditional temperature measuring element, a thermoelectric performance stability, oxidation resistance is strong, suitable for continuous use in oxidation, the inert atmosphere, is widely applied in all kinds of production in the process of measurement of the temperature of high temperature occasion, such as glass, ceramics and industrial temperature measurement in the salt bath furnace, etc. Its long-term working temperature is 1600 ℃, short-term use to measure the temperature of 1800 ℃. So, platinum rhodium thermocouple, thermocouple, also known as the high temperature precious metals platinum rhodium with single platinum rhodium and platinum rhodium, as temperature measurement sensor, usually with temperature transmitter, controller and display instrument, such as to form the process control system, used to directly measure or control all kinds of fluid, fluid under high temperature, steam and the temperature of the solid surface.

the advantages and disadvantages of platinum-rhodium thermocouple:

platinum-rhodium thermocouple temperature sensor with high measurement accuracy, good stability, wide temperature range, long life and other advantages, particularly suitable for high temperature and oxidation inert environment under the condition of temperature measurement. Among them, the B type thermocouple temperature sensor has an obvious advantage is that don't need a compensation conductor temperature compensation, because it is in the range of 0 ~ 50 ℃ heating electric potential is less than 3 mu V. Shortcoming in its thermoelectric potential rate is small, low sensitive to read, do not apply to a reducing gas and it has a metal or nonmetal steam environment temperature measurement. In addition, the price is high also limits the scope of its use, in some temperature measurement occasions replaced by other thermocouple or heat resistance temperature sensors.

platinum-rhodium thermocouple principle:

high temperature platinum rhodium thermocouple temperature sensor is composed of two different components of joint on both ends of the conductor loop, when the two junction temperature is not at the same time, will produce thermal current in the circuit, if there is a matching display instrument, the instrument will display the measured temperature value. High temperature platinum rhodium thermocouple temperature sensor is mostly used for measurement of the temperature of high temperature environment, if using the environment temperature during 1000 ~ 1300 ℃ is recommended to use single platinum-rhodium thermocouple, using the environment temperature during 1200 ~ 1600 ℃ is recommended to use double platinum rhodium thermocouple, this can not only guarantees the accuracy of measurement temperature, can also extend the service life of thermocouple.