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About Temperature Sensors-Your Free Guide to Temperature Sensor Information on the Web
Selecting A Temperature Sensor

Choosing a temperature sensor can often be very straightforward, sometimes tricky, but always worth doing well. That's because these sensors, especially in science and engineering uses, can spell the difference between repeatable results and nonsense numbers. The name of the game in measurement is to measure with an amount of inaccuracy or uncertainty that is acceptable. So, the first thing you need to know is how well you need to know the value of the temperature numbers you expect to get. A simple series of questions, when answered, will usually get you started.

  1. What is the desired temperature range, the tolerable limit to the error in measurement and the conditions under which the measurement is to be performed?
  2. Is it possible to touch the object and if so would the sensor or the temperature of the object be likely to be seriously affected by the contact?
    If the answer is yes, then a non-contact temperature sensor is needed.
    If no, then the answer probably lies with one of the other sensor types.
  3. If a contact sensor appears satisfactory, then questions revolve more around temperature measuring range, satisfying the conditions of use and meeting the acceptable error allowance.

Sensor Scientific's web site has a comparison of four popular contact temperature sensor types , Thermocouples, Resistance, Thermistors and Semiconductor, shown on a one page chart and in a very readable article.

If you've got sensors you would like to have listed or linked, a good application story, a new sensor, a training course, calibration service, know of an Internet- accessible data base or other input you believe valuable, send an email. If it meets some simple norms of good taste and utility, it will be added to the site for the benefit of others. Email to:


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