Alarms are electronic systems used to monitor access or movement to an area. It uses sensors to detect changes in the environment. Then provides annunciation of the event in several ways.

The types of devices are…

  • Door or Window Contact
  • Motion Sensor
  • Glass break Detector
  • Smoke Detector
  • Manual Pull Stations

The types of notification are…

  • Horns Or Bells
  • Central Station Dispatch
  • Strobes
  • Any type of Switching

An alarm tells you and the authorities when something happens while you are away or unable to respond.

This is much different than a camera system that is passive and only supplies evidence after the event.