Answer :
Final answer:
The recommended type of interior volumetric sensor for SCIFs, vaults, and secure rooms is the Microwave sensor. The correct option is C.
Explanation:
The type of interior volumetric sensor that is recommended for use in SCIFs, vaults, and secure rooms is Microwave sensor. Microwave sensors use microwave radiation to detect movement within a designated area. They are able to penetrate walls and partitions, making them suitable for highly secure areas.
Passive Infrared (PIR) sensors detect infrared energy emitted by humans and animals, but they have limitations when it comes to detecting movement through walls. Ultrasonic sensors use sound waves to detect movement, but they can be affected by other objects in the environment. Photoelectric sensors, on the other hand, use light beams and are more commonly used for outdoor applications. The correct option is C.
