The Advantage of Tungsten Rhenium Thermocouples

Tungsten-rhenium thermocouples with temperature a good linear relationship between electric potential, thermal stability, reliable, cheap, etc., can be directly measured liquids, steam and gases such as temperature. Tungsten-rhenium thermocouples can partially substitute platinum-rhodium thermocouple as high metallurgical industry, high-temperature electronic structure of thermoelectric systems engineering and space vehicles, ultra-high temperature nuclear reactors measurement tools.

Tungsten-rhenium thermocouples for temperature dependence of thermopower meet ZBN05003-88 indexing table, equivalent ASTME696-84 standards. In a vacuum, reducing, inert atmosphere, it is possible within the range 0 ~ 2300 ℃ use. Tungsten-rhenium thermocouple protection tube using a special tungsten rhenium even can at 1600 ℃ under oxidizing atmosphere, long-term use, its price is lower than the platinum-rhodium thermocouple.

Tungsten-rhenium thermocouples is 1931 by Goedecke (Ge virtues g) first developed out at 60 to 70 years to develop the most successful refractory metal thermocouples. Tungsten-rhenium thermocouple is characterized by: a high melting point hot wire (3300 ℃), vapor pressure, easily oxidized; in a non-oxidizing atmosphere, good chemical stability. Emf, high sensitivity, the most important is cheap.

Tungsten-rhenium thermocouples indexing with W / (W-26Re), (W-3Re) / (W-25Re), (W-5Re) / (W-26Re) and (W-5Re) / (W-20Re ), etc. Long-term use temperature of 2000 ~ 2400 ℃, short-term use up to 3000 ℃.


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