Question:
Which of the following temperature sensors is used in contact-type digital thermometers for measuring body temperature?
Which of the following temperature sensors is used in contact-type digital thermometers for measuring body temperature?
Show Hint
Thermistors are commonly used in digital thermometers for their high sensitivity, fast response time, and accuracy in measuring body temperature.
Updated On: Dec 24, 2025
- Thermocouple
- Thermistor
- Resistance temperature detector
- Infrared LED-photodetector pair
Hide Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
Thermistors are temperature-sensitive resistors that change their resistance with temperature. They are highly sensitive to temperature changes and have a fast response time, which makes them ideal for contact-type digital thermometers used to measure body temperature.
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).
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).
Was this answer helpful?
0
0
Top Questions on Sensors and transducers
Questions Asked in GATE BM exam
- Consider two cuboidal blocks of volume 1 cm\(^3\) each, one made of gold and the other of undoped silicon. What will happen to the resistivity of these blocks if the temperature is increased from 300 K to 350 K? Choose one of the following.
- GATE BM - 2026
- Material Properties
- Cerebrospinal fluid in humans is present in the _______________ space.
- GATE BM - 2026
- General Physiology
- For a tissue with Young's modulus 4 kPa and shear modulus 1.5 kPa, what is the value of the Poisson's ratio?
- GATE BM - 2026
- Material Properties
- At time t, the cardiac dipole is oriented at - 45° (minus forty five degrees) to the horizontal axis. The magnitude of the dipole is 3 mV. Assuming Einthoven frontal plane configuration, what is the magnitude (in mV) of the electrical signal in lead II? (Round off the answer to two decimal places.)
- GATE BM - 2026
- Material Properties
- In the human pancreas, which cell types secrete insulin and glucagon?
- GATE BM - 2026
- General Physiology
View More Questions