exotic thermocouple

I have recently started to use an 1800 deg C kiln. It is equipped with a thermocouple specified as a PR2040. Anyone know the mV vs.
temperature characteristic of this type of thermocouple?
TIA
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snipped-for-privacy@cof.com.au wrote:

Pt's one of the platinum-rhodium thermocouples. Type B?
Jerry
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Jerry Avins wrote:

Probably not. Google for PR 20-40. Pt-20% Ro vs. Pt-40% Ro?
Jerry
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On Sun, 03 Jul 2005 21:17:30 -0400, the renowned Jerry Avins

Type B is Pt 6% Rh/ Pt 30% Rh. R and S have a pure Pt leg.
This is a more exotic type, without an ISA designation AFAIK.
I have a very old document (in German only) that shows the output of this type at 1800C as only about 4.5mV, and somewhat like B, rather flat at the low end.
Best regards, Spehro Pefhany
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Spehro Pefhany wrote:

It's a standard, but not lettered pair. A line from http://www.thermalinc.com/temp/products/pdf/ut320350tti.pdf :
Multiple inputsthermocouple (K, J, T, B, S, R, N, E, L, U, W, Platinel 2, PR20-40, W97Re3-W75Re25), ...
Jerry
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On Sun, 03 Jul 2005 23:05:58 -0400, the renowned Jerry Avins

Yes, and it seems to be mostly or entirely supported by Japanese instruments.
Anyone have a pointer to modern tables or equations for this type?
Best regards, Spehro Pefhany
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