Where are magnetic or mechanical switches typically installed?

Magnetic or mechanical switches are commonly installed on doors because their primary function is to detect the position of the door—whether it is open or closed. When a door equipped with a magnetic switch is closed, the switch is activated, allowing the security system to monitor the door's status. This setup is crucial for access control and security monitoring in facilities, enabling prompt alerts if unauthorized access is attempted.

While magnetic switches can also be found on windows for similar purpose, the more standard and prominent use is indeed on doors, where the majority of entry and exit for security systems is monitored. The installation of these switches on walls or ceilings is less typical as they are more focused on monitoring entry points rather than flat surfaces or overhead areas.