Electronic Thermometer
Digital thermometers rely on the principle that the electrical resistance of metal changes with temperature.
Digital thermometers are different to traditional thermometers such as liquid filled and bi-metal thermometers in that they require a sensor.
Typically the sensor used in digital thermometers will be one of the following four:
- Solid State Sensors
- Resistance Temperature Detectors (RTD or PT100)
- Thermistors
- Thermocouples
- All of these sensors work by producing a resistance, current or voltage in reaction to a change in temperature.
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