Tungsten-rhenium thermocouples:
　　Tungsten rhenium thermocouple (W thermocouple; wolfram thermocouple) has good chemical stability, a large electromotive force, and high sensitivity in a non-oxidizing atmosphere.
　　It can measure the temperature of the liquid, steam and gas medium directly with display instrument. The using temperature is 1300 ~ 1700 ℃. It can partially substitute for platinum and rhodium thermocouple as ultra-high temperature measurement tools used in high-tech metallurgical industry, high-temperature electronic thermoelectric system structure engineering and space delivery vehicles, and nuclear reactors.