Installers should match the mounting location and coverage pattern to the space: ceiling-mounted sensors provide 360-degree coverage, wall-mounted sensors cover 180 degrees, hall-mounted sensors support long-range coverage, and corner-mounted sensors cover 90 degrees. They should also confirm compatibility with the connected dimming or switching devices, account for line-of-sight or wall obstructions, and choose a wireless, battery-powered option that supports the installation layout.

Wireless vacancy sensors use passive infrared sensing to detect movement and communicate with compatible dimmers and switches through a dedicated radio frequency connection. The sensor sends wireless commands to control connected lights, supporting manual-on and automatic-off operation, with some configurations also supporting automatic turn-on in low ambient light.

Professionals should compare whether the sensor supports manual-on operation, automatic shutoff, and low-light control, along with how those settings coordinate with compatible dimming or switching devices. Adjustable timeout options, such as one, five, fifteen, or thirty minutes where available, can help match the lighting response to the room and its use.

Vacancy sensors can help control lighting in residential bathrooms, garages, laundry rooms, utility rooms, hallways, and other areas where lights may be left on. In commercial spaces, they can support lighting control in offices, corridors, work areas, and similar rooms, with wall-, ceiling-, hall-, or corner-mount options for different layouts.