The tungsten rhenium thermocouple is a high temperature thermocouple. It has the advantages of good temperature-potential linear relationship, reliable thermal stability and low price. Matched with the display instrument, it can directly measure the temperature of liquid, steam and gas medium.

tungsten rhenium thermocouple can partially replace platinum-rhodium thermocouple as a high-tech metallurgical industry, high-temperature electronic thermoelectric system structural engineering and space vehicles, and ultra-high temperature measurement tools for nuclear reactors.
The relationship between thermoelectric potential and temperature of tungsten rhenium thermocouple complies with ZBN05003-88 graduation table, which is equivalent to ASTME696-84 standard. In vacuum, reducing and inert atmosphere, it can be used in the range of 0~2300℃. Tungsten-rhenium couples with special protection tubes can also be used for a long time in an oxidizing atmosphere at 1600 °C, and their price is lower than that of platinum-rhodium thermocouples.
The tungsten rhenium thermocouple is highly oxidative and is suitable for use in inert or dry hydrogen, or isolated from oxygen with a dense protective tube. It cannot be used in carbon-containing atmosphere (for example, in an atmosphere containing hydrocarbons, it will be corroded when the temperature exceeds 1000 °C). Tungsten or tungsten-rhenium tends to form stable carbides in a carbon-containing atmosphere, which reduces its sensitivity and causes brittle fracture, and in the presence of hydrogen, accelerates carbonization.