Alarm Systems
Burglar (or intrusion), alarms are systems designed to detect unauthorized entry into a building or area. They consist of an array of sensors, a control panel and 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 -ends, or microwaves.
Sensors may be directly wired to a control panel that provides sensor power, or may communicate wirelessly.