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Thermistor problem

  1. Mar 11, 2014 #1
    Ok so I am trying to figure out what type of material a thermistor should be, and am using the equation ΔR=kΔT (R being the resistivity, k being the temperature coefficient of resistivity, with which I want to find and match it up with a material, and T being the temperature). I have the change in temperature and the resistivity is initially at zero, but I don't have either the final resistivity or k. Can anyone give me some guidance? Thanks!
  2. jcsd
  3. Mar 12, 2014 #2


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    Thermistors are often non-linear. Some are designed as self heating regulation devices, others as temperature sensors. You need to measure the characteristics of your device and identify thermal conductivity regarding self heating.
    Start here; http://en.wikipedia.org/wiki/Thermistor
  4. Mar 12, 2014 #3


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    Is this a school experiment? It sounds like one I supervised a few years ago.

    If so, you need to measure the resistance at several temperatures (known temperatures - ice water, boiling water, etc) using Ohm's law with measured voltages and currents. Then plot your results.

    k is the slope of the curve.
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