Tungsten-Rhenium Thermocouples and Temperature Tolerance Overview

A tungsten rhenium thermocouples overview

Tungsten- rhenium thermocouples is high temperature thermocouples. It has the potential of a linear relationship between temperature , thermal stability , reliable, cheap, etc. . And display instrument for direct measurement of liquids , steam and gases such as temperature. It can partially substitute platinum-rhodium thermocouple as high metallurgical industry , high-temperature electronic thermoelectric systems and space vehicle structural engineering , 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 , at 0 ~ 2300 ℃ range. The use of special protective tube tungsten rhenium even can at 1600 ℃ under oxidizing atmosphere, long-term use , its price is lower than the platinum- rhodium thermocouple .

Second, tungsten rhenium thermocouple temperature tolerance tungsten rhenium thermocouples

Temperature 1300 ~ 1700 ℃ Tolerance 0.5% | t |
0 ~ 2300 ℃ Tolerance 1% | t |

Third, temperature insulation resistance : tungsten rhenium thermocouples in the ambient air temperature of 20 ± 15 ℃, relative humidity less than 85% , the heat between the electrode and the outer protection tube insulation resistance should be greater than 100MΩ.m.

Forth , tungsten rhenium 3/ 25 tungsten rhenium thermocouple protection tube outer

( 1 ) silicon carbide tube (Sic) at 1600 ℃ oxidizing atmosphere using the following
( 2 ) molybdenum disilicide tube (Mosi2) at 1600 ℃ under air and some corrosive atmospheres ( supply agreement )
( 3 ) molybdenum tube (Mo) at 2300 C in vacuum using the following ( supply agreement )
( 4 ) tantalum tube (Ta) at 2300C using the following vacuum ( supply agreement )

Fifth , tungsten rhenium thermocouple indexing are: tungsten rhenium 3 - 25 tungsten rhenium , tungsten, rhenium 5 - tungsten- rhenium 26.


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