On Tue, 27 Oct 1998, Mark Willis wrote:

>   I know (Part of the problem I'm having is that I know little of what
> they're doing, what I do know isn't in accordance with what they're
> saying, and as we all know, adding more metals to a mix usually
> decreases the melting temperature of all of them (as they dissolve in
> each other, sorta!)  Trying not to bore the whole list with a discussion

I don't think there would be anywhere nearly enough dissolving to make a
noticeable change in melting points; the problem is that one metal in the
solid phase can be soluble in another metal at the liquid phase. Melting
points are not the issue; I can dissolve sugar in water, without any
interest in the melting point of sugar. This situation is similar in
many ways.

>   Yep <G>  Those parts I remember (I may series connect a bunch of type
> S thermocouples myself, to raise the voltage, which is good.)

One little problem there... when you connect thermocouples in series, you
generate a whole lot of reverse thermocouples in the process of
connecting them. These will mostly counteract the thermocouples you're
interested in, and unless you can keep the unwanted thermocouples at a
very controlled temperature, they'll add uncertainty to your measurement.

Still, it's a neat problem to solve. Be sure to tell us all you can right
before you sign that NDA. Best of luck, & take care...

Wes B.

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* wesb@spectra.net *       "It's a magical world, Hobbes ol' buddy...       *
*                  *          ..Let's go exploring."     - Calvin           *
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