@dhenry
Ok, that means PTC thermistors could measure negative temperatures, too (with positive power supply) ?
@robtillaart
This one looks great! The range -55°C ~ +125°C is even more than what I would need.
However, is this only the thermistor (so I have to add a constant resistor) or can I simply attach the pins to VCC, GND, and an other pin (that means the other circuit is built-in)?