How do alarm systems work?

An alarm system includes sensors which can be of different types:

-  door or window-opening detectors generating a magnetic beam which is broken during an intrusion, therefore triggering the alarm,

-  outdoor or indoor motion detectors using infrared to detect a presence,

-  more rarely: glass break detectors.

In the event of a break-in, detectors transmit an electrical signal to the alarm system control panel, using a wired or radio connection, then the control panel transforms this information into an alarm. An audible and / or light signal is triggered and the central monitoring station can be contacted.

Before choosing an alarm system, remember to check that it can continue to operate in the event of a power failure (siren included).