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Which of the following type of sensor detects changes in infrared radiation or heat levels?

22. Which of the following type of sensor detects changes in infrared radiation or heat levels?

  1. Force sensor
  2. Hall effect sensor
  3. Velocity sensor
  4. Pyroelectric sensor

Answer: D) Pyroelectric sensor

Explanation:

A pyroelectric sensor detects changes in infrared radiation or heat levels.

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