Which of the following is NOT typically a volumetric burglar alarm sensor?

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Pass the California Alarm Company Operator Exam. Study with flashcards and multiple choice questions, each with hints and explanations. Prepare for your exam with confidence!

Multiple Choice

Which of the following is NOT typically a volumetric burglar alarm sensor?

Explanation:
Volumetric sensors detect movement within a defined space by monitoring changes inside that volume. Infrared PIR sensors watch for changes in heat in a room, while ultrasonic and microwave sensors emit energy and track how it travels or reflects to sense motion inside the area. Magnetic contact sensors, on the other hand, are boundary devices that detect the opening or closing of a door or window through a simple switch (reed switch). They don’t monitor activity within a space, so they aren’t considered volumetric detectors. Thus, magnetic contact sensors are not typically volumetric sensors.

Volumetric sensors detect movement within a defined space by monitoring changes inside that volume. Infrared PIR sensors watch for changes in heat in a room, while ultrasonic and microwave sensors emit energy and track how it travels or reflects to sense motion inside the area. Magnetic contact sensors, on the other hand, are boundary devices that detect the opening or closing of a door or window through a simple switch (reed switch). They don’t monitor activity within a space, so they aren’t considered volumetric detectors. Thus, magnetic contact sensors are not typically volumetric sensors.

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