It is now common to measure temperature with electronics. The most common sensor is a thermoresistor (or thermistor).
This device changes its resistance with changes in temperature. A computer or other circuit measures the resistance and converts it to a temperature, either to display it or to make decisions about turning something on or off. If you would like to build your own electronic thermometer, check out How Microcontrollers Work.
For more information on thermometers and related topics, check out the links below!
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- How Microcontrollers Work - has instructions on building your own digital thermometer!
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More Great Links!
- The Thermometer
- Fahrenheit's Thermometer
- Mercury Fever Thermometers FAQ - from the EPA
- Aeronautics: Making an Air Thermometer
- Using a Meat Thermometer - from the USDA
- Science Projects: Make A Thermometer
- PC Thermometer