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Furnace temperature

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Lew_Merrick_PE:

--- Quote from: DMIOM on June 26, 2012, 10:16:14 AM ---Must be a trick spot welder to weld those hot junctions.

So - next challenge for Rob 'the miracle worker' Wilson - can you come up with a suitable rig (chrome plated of course) so we can all make our own?
--- End quote ---

Dave -- You don't need to weld TC wires together (though I agree that it is better and more accurate if you do), you can just coat them thermally conductive grease, twist them together, and squash them in a press for intimate contact.  Probably half the TC's currently measuring experiments in R&D labs around the world are assembled this way.

Hopefully I have not lost it (a paper -- not my mind), but I have instructions for making a calibrating an optical pyrometer that we used to measure hypergolic plumes a few years back.  Other than gaining access to qualified high temperature test standards, it is a simple device that only costs a few $$$ to build (under $15 as I recall from 2005).  As my unit was built using customer's parts on time they paid for, it ended up staying with the customer after my work was done.

ironman:
Looks like you have covered the answers I was about to give, R type wire is very expensive but will go to 1770C. K type will only go to 1200c but it is very cheap. That unit I bought about 18 years ago and was very expensive and I see nothing has changed.  ironman

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