Which device is used to detect motion within the facility?

Which device is used to detect motion within the facility?

• A. Microwave motion detectors
• B. Cameras
• C. Gates
• D. Razor wire

Answer: (A)

Motion detection relies on sensors designed to sense movement and trigger an alert. Microwave motion detectors emit low-power microwaves and listen for changes in the reflected signal caused by moving objects. This lets them detect movement across a space—often through walls and without relying on lighting or line-of-sight—and quickly alert security systems. Cameras can notice movement by capturing video, but they are primarily recording devices that rely on image analysis to detect motion, which is a different role from a dedicated motion sensor. Gates and razor wire are barriers that block access rather than detect movement. So, the device used to detect motion within the facility is the microwave motion detector.

Motion detection relies on sensors designed to sense movement and trigger an alert. Microwave motion detectors emit low-power microwaves and listen for changes in the reflected signal caused by moving objects. This lets them detect movement across a space—often through walls and without relying on lighting or line-of-sight—and quickly alert security systems.

Cameras can notice movement by capturing video, but they are primarily recording devices that rely on image analysis to detect motion, which is a different role from a dedicated motion sensor. Gates and razor wire are barriers that block access rather than detect movement.

So, the device used to detect motion within the facility is the microwave motion detector.