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Thermocouple(T/C) 熱電偶

 Type J Thermocouple: The type J is also very common. 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 to 1,400F (-210 to 760C)
  • Extension wire, 32 to 392F (0 to 200C)

Type J Accuracy (whichever is greater):
  • Standard: +/- 2.2C or +/- .75%
  • Special Limits of Error: +/- 1.1C or 0.4%

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

 

Type K Thermocouple (Nickel-Chromium / Nickel-Alumel): The type K is the most common type of thermocouple. It’s inexpensive, accurate, reliable, and has a wide temperature range. The type K is commonly found in nuclear applications because of its relative radiation hardness. Maximum continuous temperature is around 1,100C.

Type K Temperature Range:
  • Thermocouple grade wire, –454 to 2,300F (–270 to 1260C)
  • Extension wire, 32 to 392F (0 to 200C)

Type K Accuracy (whichever is greater):
  • Standard: +/- 2.2C or +/- .75%
  • Special Limits of Error: +/- 1.1C or 0.4%

Type of K Thermocouple
  • Consideration for bare wire type K thermocouple applications:
 

 

Type T Thermocouple (Copper/Constantan): The Type T is a very stable thermocouple and is often used in extremely low temperature applications such as cryogenics or ultra low freezers. It is found in other laboratory environments as well. The type T has excellent repeatability between –380F to 392F (–200C to 200C)..

Type T Temperature Range:
  • Thermocouple grade wire, -454 to 700F (-270 to 370C)
  • Extension wire, 32 to 392F (0 to 200C)

Type T Accuracy (whichever is greater):
  • Standard: +/- 1.0C or +/- .75%
  • Special Limits of Error: +/- 0.5C or 0.4%

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


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