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Old 2019-04-29, 4:27am
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Speedslug Speedslug is offline
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Join Date: Mar 21, 2009
Location: Winnebago, MN
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My first thought runs to ceramics and the temperature 'cones' used in kilns for clay work.

My second thought is that perhaps industrial catalogs like Grainger or McMaster-Carr may have either what you are looking for or can give you a pointer in a direction toward helping find a source.

Another thought is scientific supplies of some sort.
The blast furnace industry probably use calibrated infrared based cameras to measure metals just prior to pouring.
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Last edited by Speedslug; 2019-04-29 at 4:33am.
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