Which of the following temperature sensors is used in contact-type digital thermometers for measuring body temperature?
Show Hint
- Thermocouple
- Thermistor
- Resistance temperature detector
- Infrared LED-photodetector pair
The Correct Option is B
Solution and Explanation
Thermocouples, RTDs, and infrared sensors are also temperature sensors, but they are not commonly used in digital thermometers for body temperature measurements due to their different characteristics:
- Thermocouples are used for a wide range of temperatures but have a slower response and less accuracy at lower temperatures compared to thermistors.
- RTDs and infrared sensors are more suitable for industrial or non-contact temperature measurements.
Thus, the correct answer is (B).
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