What may be installed by property owners to restrict access to their property and can be a heavy motorized device?

A security gate can be installed by property owners to restrict access to their property and is often a heavy motorized device. These gates are designed to provide a physical barrier that controls who can enter or exit the property. Security gates can be equipped with various access control mechanisms, such as keypads, card readers, or intercom systems, enhancing their functionality in regulating access.

While other options like an access control panel, intrusion detection systems, and barrier fences are also relevant in the context of property security, they do not serve the same purpose as a security gate. An access control panel is generally a system used to manage and control access points electronically, rather than acting as a physical barrier. An intrusion detection system monitors for unauthorized entry but does not physically restrict access. A barrier fence can deter entry but lacks the operational mechanisms that a motorized security gate provides for controlled access. Thus, the security gate stands out for its dual role of restricting access and being a heavy motorized device.