PART FINDER (er, MONDAY!) – Thermistors

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Thermistors are a simple but very precise method of measuring temperature. The resistance changes dramatically as the body gets colder and hotter. Thermistors tend not to be used for very hot temperatures (these low cost ones have vinyl wires that top out at 100c degrees C) but they’re much cheaper than thermocouples and very easy to read using a simple voltage divider. They’re more precise than digital temperature sensors (those always have an error of +-1 degree C) at 1% you can get better than +-0.2 degree C. These are often used for cold/warm temperature sensing and for battery chargers.

We carry a basic 10K 1% NTC thermistor but you can also pick up a range at digikey.

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3 Comments

  1. Mike
    May 30, 2011 at 5:50 pm

    quote (these low cost ones have vinyl wires that top out at 10c degrees C) /quote

    I think you must mean 105c or something close.

  2. ladyada
    May 30, 2011 at 6:04 pm

    woops, typo fixed. 105C is correct, but we suggest no more than 100C anyways 🙂

  3. Arun Gopalakrishnan
    June 2, 2011 at 10:16 am

    Arenasolutions PartSaver will be a good companion to the Part Finder. Once you identify a part you want to use, click a button in the browser it will add an entry for the part in your spreadsheet in Google Docs. Would love to hear from you about the utility of the PartSaver and any other feedback you may have. There is a feedback button in PartSaver interface.

    Give PartSaver a try at http://bit.ly/iSbxr6

    Thanks!

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