Project Description

Thermocouples Extension and Compensating Alloys

Thermocouple Extension and Compensation Alloy Wire is to extend the hot electrode (cold end of the thermocouple), and connect with the display instrument to form a temperature measuring system. The operating temperature is -25-200℃.

HB SPECIAL ALLOY mainly produce KX, NX, EX, JX, TX, SC/RC, KCA, KCB and WRENC Extension and Compensation Alloy Wire for Thermocouples. They are used in all kinds of temperature measuring devices and cables, and have been widely used in nuclear power, petroleum, chemical industry, metallurgy, electric power and other fields.

Our Thermocouple Extension and Compensation Alloy Wire is produced according to GB/T 4990-2010 ‘Alloy Wires of Extension and Compensating Cables for Thermocouples’ and IEC 60584-3-2007 ‘Standard | Thermocouples – Part 3’.

EMF of Compensating Wire and the Tolerance

Thermocouple Index No.Extension and Compensating Wire TypeUsage ClassificationMeasuring Junction Temperature, ℃Standard EMF Value, μVPrecision GradeGeneral Level
Tolerance, μVThermal EMF Range, μVTolerance, μVThermal EMF Range, μV
S or RSC or RCG100646±30616-676±60586-706
H100646±60586-706
200114411.381-1501
KKX, KCA or KCBG-25-968±40-924–1012±80-1936
1004096±404052-41404008-4184
H-25-968±40-924–1012±88-1936
10040964052-41404008-4184
20081388094-81828050-8226
NNX or NCG-25-646±43-1292±86-1292
10027742731-28172688-2860
H-25-646±43-1293±86-1292
10027742731-28172688-2860
200591235870-59565827-5999
EEXG-25-1432±81-2864±138-2864
10063196238- 64006181-6 457
H-25-1432±81-2864±138-2864
10063196238-64006181-6457
2001342113340-1350213283-13559
JJXG-25-1239±62-2478±123-2478
10052695207-53315146-5392
H-25-1239±62-1478±123-2478
10052695207-53315146-5392
20010779±6210717-10841±12310656-10902±1℃ or ±1.5%t
TTXG-25-940±30-910 970±60-1850
10042794249-43094189-4339
H-25-940±48-1880±60-1880
10042794231-43274189-4369
20092889240-9198-9378

 

Compensation Wire TypeReciprocating Resistance at ℃ Ω/m (less than)
0.2mm20.5mm21.0mm21.5mm22.5mm2
SC or RC0.250.10.050.030.02
KCA3.51.40.70.470.28
KCB2.61.040.520.350.21
KX5.52.21.10.730.44
EX6.252.51.250.830.5
JX3.251.30.650.430.26
TX2.61.040.520.350.21
NC3.751.50.750.50.3
NX7.152.861.430.950.57