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Quiz: Temperature Sensors, Part 2

21 Mar 2016  | Martin Rowe

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  1. Which type of temperature sensor is often used in extreme conditions such as cryogenic temperatures?
    1. Acoustic
    2. Thermocouple
    3. RTD
    4. Thermistor
    5. Piezoelectric
    6. PN junction
    7. a and c only
    8. a and f only
    9. c and f only

temperature sensor

Figure 4: Model 612 temperature monitor. (Source: Cryomagnetics)

  1. Who discovered the use of platinum for use as a temperature sensor?
    1. Ole Roemer
    2. Sir William Thompson (Lord Kelvin)
    3. Sir Humphrey Davy
    4. Sir Hugh Callendar
    5. Daniel Gabriel Fahrenheit

temperature sensor in circuit

Figure 5: A coil of platinum sensing wire surrounded by powder packing inside a protection tube. (Source: Rdf Corp.)

  1. True or false: Thermocouples rely on the physical principle that, when any two different metals are connected together, an emf (electromotive force or voltage), which is a function of temperature, is generated at the junction between the metals.

temperature sensor in circuit

Figure 6: A simple thermocouple circuit. (Source: Maxim Integrated)

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