Wired security system motion sensors connect directly to an alarm panel or power source, so installation typically involves running cable, while wireless sensors communicate with a compatible security system over radio and can simplify placement where cabling is difficult. IP-connected motion sensors use the network, often with Power over Ethernet (PoE), to send motion events to compatible video management, camera, or automation systems for centralized monitoring and event-driven actions.

Use passive infrared (PIR) security system motion sensors for standard indoor or outdoor zones where detecting changes in infrared energy provides practical coverage, including wall-mounted, ceiling-mounted, and pet-immune applications. Choose dual-technology sensors for harsher environments or areas prone to false alarms, and use 360-degree ceiling sensors when one device needs to monitor movement from multiple directions across a room.

Wall-mount sensors provide a forward-facing coverage pattern, while corner mounting can help aim coverage across two adjoining areas and reduce blind spots caused by room geometry. Ceiling-mount sensors provide a downward, 360-degree pattern when positioned near the center of the protected space, making them well suited for open rooms, lobbies, and other areas where wall angles may limit coverage.

Security system motion sensors can reduce false alarms with selectable or built-in pet immunity, dual PIR and microwave detection, advanced signal processing, and algorithms that distinguish people from pets or other disturbances. For changing temperatures or outdoor activity, look for temperature compensation, anti-disguise or light immunity, quad-element or multi-sensor detection, and optics designed to help differentiate people from animals, moving vegetation, rain, or changing light.