Which of the following protection devices is used for spot protection within a few inches of the
object, rather than for overall room security monitoring?

A.
Wave pattern motion detectors

B.
Capacitance detectors

C.
Field-powered devices

D.
Audio detectors

Explanation:
“Capacitance. Capacitance detectors monitor an electrical field surrounding the object being
monitored. They are used for spot protection within a few inches of the object, rather than for
overall room security monitoring used by wave detectors. Penetration of this field changes the
electrical capacitance of the field enough to generate an alarm” – The CISSP® Prep Guide: Gold
Edition by Wiley Publishing Page 480.