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Thermistors: What they are and how they work

  • March 2014
  • Number of views: 13431
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Tom Bishop, P.E.
EASA Senior Technical Support Specialist

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What are thermistors?

Thermistors, derived from the term thermally sensitive resistors, are a very accurate and cost effective method for measuring temperature. Thermistors are usually two-terminal semiconductor devices made from semi-conductor materials that have an electrical resistance that varies non-linearly with temperature (see Figure 1). Some materials provide better stability while others have higher resistance ranges and are fabricated into smaller thermistors.  Each specific thermistor has its own unique resistance versus temperature characteristic. 

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ANSI/EASA AR100

More information on this topic can be found in ANSI/EASA AR100
  • Section 3: Rewinding
  • Section 4: Testing

EASA Technical Manual

More information on this topic can be found in EASA's Technical Manual
  • Section 5: Electronics

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Tags: Thermocouples thermistors thermostats Motor temperature
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