Extension vs T/C Grade T/C

[fifty60]

I have to make a a 25' run between my controller and the sensing area. I see that there are 2 different types of T/C wire grades...T/C grade and Extension grade.

For a 25foot run, where the t/c will actually be in the sensing area, which grade should I use?

 

[Smart $]

I have to make a a 25' run between my controller and the sensing area. I see that there are 2 different types of T/C wire grades...T/C grade and Extension grade.

For a 25foot run, where the t/c will actually be in the sensing area, which grade should I use?

IMO, extension grade... unless you have a very tight tolerance on the temperature measurement. T/C grade is typically used only for the manufacture of T/C's and has better accuracy.

 

[fifty60]

I think if it will be connected to a ring or probe, then you can use extension grade because the T/C is not actually in the sensing area. Extension grade generally has lower temp ratings for that very reason. T/C grade T/C will have higher temperature ratings and is expected to be in the sensing area.

I believe the extension grade may be cheaper because it has a lower temp rated jacket...that may be the only real difference...

 

[Smart $]

I think if it will be connected to a ring or probe, then you can use extension grade because the T/C is not actually in the sensing area. Extension grade generally has lower temp ratings for that very reason. T/C grade T/C will have higher temperature ratings and is expected to be in the sensing area.

I believe the extension grade may be cheaper because it has a lower temp rated jacket...that may be the only real difference...

According to the information I have seen, extension grade T/C cable is less expensive because it also uses a lower grade conductor (as in less pure metal).

Ultimately, the decision is mostly based on whether it works for your application.