1
\$\begingroup\$

I'm trying to find a part number for an NTC thermistor being used to monitor the temperature of a rechargeable battery. The thermistor I have has no color markings or numbers to indicate any information. I have measured the resistance at multiple temperatures, but I am worried my calculations are not very accurate, as I just used an ice cube and the hot surface of a food warmer. I need to ensure that the resistance - temperature curve matches the one of the thermistor I have, so that the battery charges when it should. Is there any sort of tool made to reliably produce different temperatures for measurement, or a better way I could go about this?

\$\endgroup\$
0
\$\begingroup\$

If you can wrap the thermistor in a waterproof heatproof enclosure (say, copper pipe soldered shut on one end) then an easy way to produce known temperatures is to use water's phase changes.

  • Boiling water is at 100 °C (with correction for your local air pressure based on altitude).
  • A mixture of water and ice (neither all melted nor all solid) is at 0 °C (after the water, if added separately, has cooled down; better but slower to let the ice melt to make the water).
| improve this answer | |
\$\endgroup\$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.