There was a thread
"Re: [EE]: Temperature Sensors? How'bout lamps?"

Mike.

> Any of you folks have a way to measure temperature
> semi-accurately w/o expensive thermometers?  Within
> a few degrees would be nice, and in the range of 0
> to 300 deg F.  I'm trying to test the calibration of
> a temp sensor for my car.
>
> I can use ice and hot water to get the 32- and
> 212-deg F points.  But is there a way to get 1 or 2
> points between that, and a couple other points up
> to about 300 deg F?  Is there any other liquid I
> could boil that has some known boiling point perhaps?
>
> Cheers,
> -Neil.

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