Probably an LM34 or 35. Very easy to use, I have used lots of 'em. Outputs 10mV per degree, so simple to read, no lookup table.
JOnathan
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Somebody a while ago used a 3-wire TO-92 direct temp-to-voltage IC (what he used was available in 2 types, output in F or C), and a couple resistors, in where the pot is.
Can't remember what he wanted to do with it, but it worked fine.
G-
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