From: "Brendan Moran"
Subject: [EE]: Thin thermal sensor sources


> I'm looking for some form of thermal sensor that will fit in a hole of
> ~2.5mm (.1") diameter, and ~30mm (1 1/4") deep.

I don't know if has come up recently on the list, but you can use a silicon
diode, e.g. 1n4148 - very small, and take advantage of its -0.02V per deg C
temperature coefficient.

You just need to select a bias resistor and then scale the output if
necessary and there you go. I'm not sure over what sort of range this would
be linear, but with a calibration file, it doesn't matter as long as the
resolution is OK.

You might even be able to use a SM part and get much smaller than a 1n4148.

Cheers...Mike.

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