Sensor types Hermetically sealed reed switches Ī passive infrared sensor used to detect motion Such alerts transmit via dedicated alarm circuits, telephone lines, or the internet in many cases. Operators at the station see the signal and take appropriate action, such as contacting property owners, notifying police, or dispatching private security forces. In the event of an alarm, the premises control unit contacts a central monitoring station. In addition to the system itself, security alarms often offer a monitoring service. Interconnections may consist of direct wiring to the control unit or wireless links with local power supplies. In addition to buttons, keypads typically feature indicator lights, a small multi-character display, or both.
These devices can also warn occupants of a fire or smoke condition Alerting devices serve the dual purposes of warning occupants of intrusion and potentially scaring off burglars. Most commonly, these are bells, sirens, also and or flashing lights. Alerting devices: These indicate an alarm condition.
#INTRUDER ALARM WINDOWS#
For example, sensors can monitor doors and windows for openings or monitor unoccupied interiors for motions, sound, vibration, or other disturbances Sensors can detect intruders by different methods.
Sensors' locations are at the perimeter of the protected area, within it, or both.
However, a typical premises security alarm employs the following components: The most basic alarm consists of at least one sensor to detect trespassers and an alerting device to indicate the intrusion.