Type J Thermocouples

/Type J Thermocouples
Type J Thermocouples 2017-09-30T08:27:15+00:00

Type J Thermocouple

Type J Thermocouple (Iron/Constantan) is one of the more common thermocouples. It has a smaller temperature range and a shorter lifespan at higher temperatures than the Type K. It is equivalent to the Type K in terms of expense and reliability.


Type J Temperature Range
Thermocouple Grade Wire –346°F to 1,400°F (–210°C to 760°C)
Extension Wire 32°F to 392°F (0 to 200°C)


Type J Accuracy
Standard +/- 2.2°C or +/- .75%
Extension Wire +/- 1.1°C or 0.4%


Consideration for bare wire type J thermocouple applications: The Type J Is Well Suited To Oxidizing Atmospheres.


Type J Thermocouple Reference Table

type-J-ITS-90-reference-table-1 type-J-ITS-90-reference-table-2 type-J-ITS-90-reference-table-3 type-J-ITS-90-reference-table-4