Ceiling-mount indoor PIR sensors provide overhead, 360-degree coverage for rooms, while wall-mount sensors monitor broad areas from a wall or corner. Curtain-style sensors create a narrower detection pattern suited to protecting doors, windows, and all-glass walls.

Indoor PIR sensor coverage depends on mounting height and placement, with ceiling-mounted 360-degree sensors typically installed eight to twelve feet high near the center of a room, while wall-mounted sensors commonly install seven to nine feet high and cover areas across the sensor’s field of view. Select the detection pattern for the space, such as 360-degree coverage for open rooms, wide-area coverage for rooms and corridors, or a curtain pattern along doors, windows, and glass walls.

Wired indoor PIR sensors typically connect to the security panel through low-voltage wiring, using a zone input and panel power for motion detection and tamper monitoring. Wireless indoor PIR sensors enroll with a compatible receiver or control panel and communicate over the system’s supported radio protocol, so verify compatibility, frequency, and available wireless zones before installation.

Compare pet-immunity settings and weight thresholds, along with whether the sensor uses selectable pet immunity or signal-processing technology, and check for front, back, or cover tamper protection. For battery-powered indoor PIR sensors, review typical battery life, low-battery alerts, and false-alarm reduction features such as True Motion Recognition, sealed optics, or uniform sensitivity optics.