Why use platinum rhodium alloy for high-temperature resistant platinum rhodium thermocouples?

The reason why high-temperature resistant platinum rhodium thermocouples use platinum rhodium alloys is because they have various superior properties and characteristics, making them an ideal choice in high-temperature environments. ‌

Firstly, high temperature resistance is one of the main advantages of platinum rhodium thermocouples. Platinum rhodium alloys have a very high melting point and can withstand extremely high temperatures, typically reaching 1700 ° C or even higher, sometimes even exceeding 1800 ° C. This high temperature resistance enables platinum rhodium thermocouples to operate stably in extreme high temperature environments.

Secondly, chemical stability is also an important characteristic of platinum rhodium alloys. Platinum rhodium alloys exhibit excellent chemical stability in most environments and are not easily oxidized or corroded, making platinum rhodium wire thermocouples suitable for use in harsh chemical environments.

In addition, high measurement accuracy is another significant advantage of platinum rhodium thermocouples. Due to the stable Seebeck effect of platinum rhodium alloy, the generated thermoelectric potential signal is accurate, resulting in high measurement accuracy. At the same time, the output signal of platinum rhodium thermocouples has good repeatability, which is very important for application scenarios that require repeated measurements and precise control.

Finally, long-term stability and low creep rate are also important characteristics of platinum rhodium thermocouples. The physical properties of platinum rhodium alloys change very little over time and can provide long-term stable measurement results. In addition, platinum rhodium alloys have a low creep rate, and their shape and size can remain stable even at sustained high temperatures, which is crucial for maintaining the measurement accuracy of thermocouples.

In summary, high-temperature resistant platinum rhodium thermocouples have become an ideal choice for temperature measurement in high-temperature environments due to their high melting point, chemical stability, high-precision measurement, good repeatability, long-term stability, and low creep rate. ‌