dc42:
Krupski:
Or better yet... use an LM-35.....Or LM34, which has more than double the sensitivity of the LM35 and can read temperatures below 2C without a negative supply. Or DS18B20.
All depends on the application. For example, if I use an LM-35 (10 mV/degree C) and an Arduino with the A/D reference set to 1.1 volt internal, I can get a range of temperature readings from close to 0 deg.C to 110 deg.C (quite a useful range).
If I use an LM-34 (10 mV/degree F) then my range is from close to 0 deg.F to 110 deg. F (also quite a useful range). (fixed typo)
I just tossed out "LM-35" because that's what I'm used to using. In other cases, the LM-34 would be a better choice.
Really, the point of my comment was "don't use a crappy non-linear thermistor, use a nice linear solid state device"! 