Ceiling-mounted IR motion sensor FF DR-09 (FF194) 360° surface-mounted dusk switch

The FF DR-09 (FF194) ceiling-mounted IR motion sensor is a surface-mounted device offering 360° infrared detection and integrated dusk switching for automatic light control. Designed for ceiling installation, this sensor detects movement within its coverage area and switches lighting based on both motion and ambient light level, reducing unnecessary energy use in corridors, stairwells, garages and service rooms.

Advantages

The sensor provides full 360° coverage from a central ceiling position, enabling reliable presence detection across a wide area without the need for multiple units. Integrated dusk (twilight) switching prevents lights from activating during daylight, while the infrared detection ensures fast and precise response to human movement. Surface-mounted design simplifies installation on standard ceilings and minimizes wiring complexity.

Suitable for

• Corridors and hallways
• Stairwells and landings
• Garages and parking areas
• Utility rooms, storage and maintenance areas

Key specifications

• Detection method: infrared (PIR) motion detection with 360° coverage
• Mounting type: ceiling surface-mounted
• Integrated function: dusk/twilight-sensitive on/off switching
• Typical applications: indoor areas requiring automated lighting control
• Operation: automatic switching based on motion and ambient light level

How to use

Mount the sensor on the ceiling in a central position within the room to maximize the 360° detection pattern. Connect the unit to the lighting circuit following local electrical codes and ensure the dusk sensing point is oriented away from direct artificial light sources that could affect ambient light measurement. After power-up, adjust sensitivity and time-delay settings if available to suit the specific traffic patterns of the space. The sensor will then switch lighting on when motion is detected and ambient light is below the dusk threshold, and switch off after the configured absence period.

Usage recommendations

Install at a height and location that provide unobstructed view of the monitored area; avoid mounting near heat sources, air vents or reflective surfaces. Regularly check that surrounding lighting or renovation changes have not introduced stray light that could impair dusk sensing. For large or irregular spaces, consider additional units to avoid detection gaps.