Thermocouple Alloy Wire

Thermocouple Alloy Wire
Thermocouple Alloy Wire
Thermocouple Alloy Wire
Thermocouple Alloy Wire
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Introduction
Thermocouple alloy is a material that uses the feature of thermoelectrical potential changing with temperature difference to measure temperature.

Performance demands on metal thermocouple are as following
  • This alloy should has high thermoelectrical potential and temperature coefficient of thermoelectrical potential to ensure high sensitivity. And it is required that the variation of thermoelectrical potential with temperature is single-valued, preferably in a linear relationship.
  • Good oxidation resistance at high temperature and corrosion resistance to environmental medium are needed.
  • Good stability and repeatability during the use, being easy to process and low cost are also required.

It is difficult for alloy to meet these requirements, and the thermocouple materials also have their own advantages and disadvantages. So thermocouple material is selected by operating temperature.

Specifications
Conventional alloy made thermocouple wire has a size of 0.2mm, 0.5mm, 0.8mm, 1.2mm, 1.5mm, 2.0mm or 3.2mm. And we can customize the size based on customers' requirements, ranging from 0.05mm to 10mm.
The precious metal made thermocouple wire has a finest size of 0.03mm.

OHMALLOY produced thermocouple alloys include the following products
Variety Index Cathode material Anode material Max. operating temperature/℃
Temperature range of reference table/℃ Standard No.
Code name Component Code name Component Long term Short term
PtRh30-PtRh6 B BP PtRh30 BN PtRh6 1600 1800 0~1820 GB 290*2-82
PtRh13-Pt R RP PtRh13 RN Pt 1400 1600 -50~1769 GB 1598-86
PtRh10-Pt S SP PtRh10 SN Pt 1300 1600 -50~1769 GB 3772-83
NiCr-NiSi K KP NiCr10 KN NiSi3 1200 1300 -270~1373 GB 2614-85
NiCr-Constantane E EP NiCr10 EN NiCu55 750 900 -270~1000 GB 4993-85
Fe-constantane J JP Fe JN NiCu55 600 750 -210~1200 GB 4993-85
Cu-constantane T TP Cu TN NiCu55 350 400 -270~400 GB 2903-82
NiCr-gold-iron NiCr-AuFe NiCr NiCr10 AuFe AuFe0.07 (mole fraction, %) 0 - -273.15~0 GB 2904-82
Copper - gold-rion Cr-AufF Cr Cu AuFe AuFe0.07 (mole fraction, %) 0 - -270~0 GB 2904-82
NiCrSi - NiSi N NP NiCr14.5Si1.5 NN NiSi4.5MgO0.1 1200 1300 -270~1300 ZBN05004-88
Tungsten rhenium 3-Tungsten rhenium 25 WRe3-WRe25 WRe3 WRe3 WRe25 WRe25 2300 - -0~2315 ZBN05003-88
Tungsten rhenium 5-Tungsten rhenium 26 wRe5-WRe26 WRe5 WRe5 WRe26 WRe26 2300 - -0~2315 ZBN05003-88

Index
alloy wire, metal alloy

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