Type D  Tungsten rhenium-alloy thermocouples

Tungsten-rhenium thermocouples is high- -pressure thermocouple. It has a potential temperature good linear relationship, thermal stability, reliable and cheap price, etc. With display instrument, can directly measure the temperature of the liquid, steam and gas medium. It can partly replace platinum rhodium thermocouple as a high-tech, high temperature electronic thermal power system structure of metallurgy industry engineering and space vehicles, nuclear reactor of ultra high temperature measuring tool.

The tungsten rhenium thermocouple temperature tolerance

Temperature of 1300 ~ 1700 ℃ ( t) 0.5% tolerance,0 ~ 2300 C ( t ) 1% tolerance

Normal temperature insulation resistance

tungsten-rhenium thermocouples in the ambient air temperature is 20 and 15 ℃ , relative humidity is not more than 85%, the thermal insulation resistance between the electrode and the external protecting tube should be greater than 100 m Ω. M.

WRe 3 / WRe25 thermocouple protection tube

(l) silicon carbide (Sic) can be used in the oxidizing atmosphere under 1600  ℃ 
(2) the molybdenum disilicide tube (Mosi2) under 1600 ℃  in the air and some corrosive atmosphere
(3) tube molybdenum (Mo) used in vacuum under 2300  ℃ 
(4) tantalum tube (Ta) used in vacuum under 2300  ℃