Research on and Applications of Au/Pt Thermocouples

Abstract

Elemental thermocouples are capable of meeting the demanding requirements of high temperature measurement with high accuracy, wide temperature measurement range, and long operational life. With an ever increasing need for more accurate, more precise temperature measuring devices over a wide spectrum of temperatures, elemental thermocouples show great promise when compared with its counterparts. The Au/Pt thermocouple, one of the more effective elemental metal combinations, is the ideal standard thermometer in the range of 0°C - 1000°C due to its reproducibility, accuracy, stability, and durability, causing the US and Korea to standardize its use. Much academic work has been done on the accuracy, stability, thermoelectric properties, structural design, and calibration methods of Au/Pt thermocouples to develop it to its current state. This paper summarizes research done on Au/Pt thermocouples, both domestically and internationally, in order to provide a foundation for future improvement.

Isothermal performance of a temperature comparison source using potassium concentric annular heat pipe

“…With the development of thermocouples, the measurement accuracy of thermocouple such as Au/Pt type is higher than K type, S type thermocouples. 20,21 But the current metering furnace uses metal temperature equalizing block which provides low temperature stability and uniformity of temperature field. The simple and integrated heat pipe can be used to improve the temperature equalizing block and improve the calibration accuracy of the metering furnace.…”

“…Although the GCHPs have very high temperature uniformity and stability, the structure of GCHPs and pressure control system is complex, expensive and inconvenient. With the development of thermocouples, the measurement accuracy of thermocouple such as Au/Pt type is higher than K type, S type thermocouples 20,21 . But the current metering furnace uses metal temperature equalizing block which provides low temperature stability and uniformity of temperature field.…”