What Is a Home Security System and How Does it Work?
Intrusion or Burglar alarms are systems designed to detect unauthorized entry into a building or area. It consists of an array of sensors, a control panel, alerting system and interconnections. Sensors detect intruders by many methods such as monitoring door and window contacts, by passive infrared motion detectors, ultrasound, vibration, electric or magnetic fields, or microwaves. Sensors may be directly wired to a control panel that provides sensor power or may communicate