High Quality Iron/constantan Thermocouple wire type J Quality Choice

Fe- CuNi thermocouple (type J) is also named Iron-Constantan thermocouple.. It is used in vacuum, oxidizing, inert or reducing atmospheres. Iron element oxidizes rapidly at temperatures exceeding 538'C, and therefore heavier gauge wire is recommended for longer life at these temperatures. 

Type J thermocouple has good resistance to oxidation and high EMF output against Platinum 67, with good temperature accuracy, sensitivity and stability. It is recommended for vacuum, oxidizing, reducing or inert atmospheres, but it can not be used in sulphurous atmosphere above 500℃. 


Type J chemical composition:
Positive leg Fe (JP) is Pure Iron; negative leg Constantan (JN) isCu: Ni≈ 55%: 45%

Type J Temperature Range:

• Thermocouple grade wire, 0~750 ℃(for short term) and 0~600℃( for long term)
• Extension wire, 32 to 392F (0 to 200C)

Type J Tolerance:

• Standard:±1.5℃/±0.4%t

Working temperature:

1)  Pass ISO9001 and SGS certification.

2)  Samples free available.

3)  OEM service.

4)  Manufacturer test certificate will be provided If necessary.

5)  Good packing methods to keep goods safe.

6)  Choose safe,quick,price reasonable forwarder to transport for our customers.

7)  Short delivery time.

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We have public holiday during May.1-3, Oct.1-7 and Chinese New Year holiday . For detail, please see our update holiday notice. During these period, if you have a demand, Please send me an email.

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Yes, we can provide a free sample for testing,buyer should bear all the shipping costs.

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Usually sample lead time is 7 days after payment has been confirmed.

Normal order is 10-30days,it depends on customers’ quantity.

Anyway,we try to offer good-quality products as soon as possible.