What is the function of the Balanced Magnetic System (BMS)?

What is the function of the Balanced Magnetic System (BMS)?

• A. Activation- when the two magnetic switches are pulled apart
• B. Function- intrusion alarm; placed on doors, windows, openings on structures
• C. It detects motion inside the building
• D. It serves as a tamper detector

Answer: (B)

The Balanced Magnetic System functions as an intrusion sensor for openings. It’s placed on doors, windows, or other structural openings to monitor whether the opening is closed or opened. When the door or window is shut, the magnet and switch stay in a stable state; if the opening is opened, the magnetic field no longer holds the switch in that state, the circuit changes, and the alarm is triggered. This makes it specifically a protection for entry points, rather than detecting motion inside or serving mainly as a tamper detector (though some systems may include tamper features, they’re not the primary purpose here).

The Balanced Magnetic System functions as an intrusion sensor for openings. It’s placed on doors, windows, or other structural openings to monitor whether the opening is closed or opened. When the door or window is shut, the magnet and switch stay in a stable state; if the opening is opened, the magnetic field no longer holds the switch in that state, the circuit changes, and the alarm is triggered. This makes it specifically a protection for entry points, rather than detecting motion inside or serving mainly as a tamper detector (though some systems may include tamper features, they’re not the primary purpose here).