Which option best describes the Microwave Sensor's function within the system?

Which option best describes the Microwave Sensor's function within the system?

• A. It Detects Sound Waves to Identify Intrusion
• B. It Uses Video Analysis to Detect Movement
• C. Dual (Bistatic) Or Single (Monostatic) Radio Energy Sensor Used to Detect Penetration, Protected by a Tamper Switch
• D. It Measures Temperature Differences to Detect Entry

Answer: (C)

Microwave sensors detect intrusion by using radio energy rather than sound, light, or heat. They emit microwaves and watch how those waves scatter off objects in the protected area; movement causes changes in the reflected energy, which the sensor flags as intrusion. The description notes that the system can be dual (bistatic) or single (monostatic): in monostatic setups the transmitter and receiver are in one unit, while in bistatic setups separate transmitter and receiver units work together. Including a tamper switch protects the device from being opened or bypassed, ensuring that tampering is detected. This combination—radio energy sensing, configurable transmitter/receiver arrangements, and tamper protection—best matches how a Microwave Sensor functions. The other options describe sound-based, video-based, or temperature-based detection, which rely on different technologies.

Microwave sensors detect intrusion by using radio energy rather than sound, light, or heat. They emit microwaves and watch how those waves scatter off objects in the protected area; movement causes changes in the reflected energy, which the sensor flags as intrusion. The description notes that the system can be dual (bistatic) or single (monostatic): in monostatic setups the transmitter and receiver are in one unit, while in bistatic setups separate transmitter and receiver units work together. Including a tamper switch protects the device from being opened or bypassed, ensuring that tampering is detected. This combination—radio energy sensing, configurable transmitter/receiver arrangements, and tamper protection—best matches how a Microwave Sensor functions. The other options describe sound-based, video-based, or temperature-based detection, which rely on different technologies.