How do burglar alarms set off?

Burglar alarms are triggered by various methods, such as motion detectors, door/window sensors, and glass break detectors. When a sensor detects unauthorized movement or a breach, it sends a signal to the alarm system, which can activate a loud siren, alert the monitoring service, or send notifications to the property owner. Some systems may also include features like camera activation or remote alerts via smartphone apps. Regular maintenance and testing help ensure these systems function effectively when needed.