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10K Precision Epoxy Thermistor - 3950 NTC


$6.95 AUD, inc GST
$6.32 AUD, exc GST
10K Precision Epoxy Thermistor - 3950 NTC
6.95 AUD


$6.95 AUD, inc GST
$6.32 AUD, exc GST
3 reviews 0 5 4.4
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  • $6.95 Standard (2-4 days, tracked)
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Need to measure something damp? This epoxy-coated precision 1% 10K thermistor is an inexpensive way to measure temperature in weather or liquids. The resistance in 25 °C is 10K (+- 1%). The resistance goes down as it gets warmer and goes up as it gets cooler. For specific temperature-to-resistance, check the lookup table.

These are often used for air conditioners, water lines, and other places where they can get damp. The PVC coating of the wires is good up to 105 °C so this isn't good for very hot stuff.

Adafruit even toss in an additional 1% 10K resistor which you can use as calibration or for a resistor divider.

Adafruit have a great detailed tutorial on how thermistors work and how to use this one best!

Technical Details

  • Resistance at 25 degrees C: 10K +- 1%
  • B25/50 = 3950+- 1%
  • Thermal time constant <= 15 seconds
  • Thermistor temperature range -55 °C to 125 °C
  • 28 AWG PVC Wire


  • Diameter: 1.3mm / 0.05"
  • Length: At least 457mm/18" long

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Documentation and Resources:

Product Comments

Customer Reviews

  1. Review by Pete verified purchaser

    perfect for my application (Posted on 27/02/2018)

  2. Review by Gavin verified purchaser

    Seems to work well. I have paired it via a voltage divider with a MCP3002 ADC to a Raspberry Pi. I have found I have needed to smooth the readings in software though as it moves around slightly. (Posted on 31/10/2016)

  3. Review by David - Works fine verified purchaser

    These seem to work fine with the standard thermistor sketches you can find for Arduino through Google. (Posted on 1/12/2014)

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