Wall-mounted infrared motion detectors typically cover broad areas across rooms and can mount on walls or in corners, while ceiling-mounted detectors provide overhead, often 360-degree coverage for rooms and open spaces. Curtain-style infrared motion detectors create a narrower detection zone along doors, windows, or glass walls, making them useful for monitoring specific openings rather than an entire room.

Wired infrared motion detectors connect to a security panel through low-voltage wiring, typically using detector outputs and, on some models, end-of-line resistors for panel compatibility. Wireless infrared motion detectors communicate with a compatible security system over the system’s supported radio protocol and frequency, so installers should verify panel compatibility, enrollment, and tamper reporting before installation.

Choose pet-immunity infrared motion detectors when animals may move through the protected area and you want the sensor to help distinguish pets from people, with the supported pet-weight limit varying by device. Choose dual-technology detection for harsher indoor or outdoor installations where combining passive infrared and microwave sensing can help reduce false alarms from environmental disturbances.

When installing infrared motion detectors indoors, consider wall or ceiling placement, mounting height, room size, coverage pattern, and potential obstructions, and select pet-immunity settings when applicable. For outdoor applications, use a detector designed for exterior movement detection, then account for detection angle, programmable range, boundary overspill, lighting, and connections to cameras, lights, or a security system.