By the way, here are a few documents on temperature control of fluids:

http://sujan.hallikainen.org/hi/brochures/1124.pdf

http://sujan.hallikainen.org/hi/brochures/1215.pdf

http://sujan.hallikainen.org/hi/brochures/thermodyne.pdf

http://sujan.hallikainen.org/hi/brochures/1053.pdf

None of this PIC stuff... This stuff is all vacuum tube controlled!

Harold


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