The Lutron Radio Powr Savr PHPM-WBX-120 is a wireless, battery-powered occupancy/vacancy sensor designed for automatic lighting control in commercial and residential applications to enhance energy efficiency. This device functions by detecting infrared body heat and motion within its designated field of view, automatically turning connected lights on when occupancy is sensed and off after a pre-set period of vacancy. It operates on the Clear Connect RF wireless protocol, Lutron's proprietary and robust frequency-hopping system, which allows it to communicate wirelessly with compatible Lutron dimmers, switches, and plug-in modules without the need for hardwired control wiring. This makes it an ideal solution for retrofit projects where installing new wires is costly or impractical, enabling quick upgrades to energy-saving automated lighting in existing buildings.

The sensor is designed for surface or corner mounting on walls or ceilings, providing a wide 180-degree field of view and a detection range suitable for typical room sizes. It features advanced sensing technology that can distinguish between minor background motion (like moving blinds) and actual human presence, reducing false triggers. Users can configure key parameters such as the timeout delay (the time the lights remain on after the last detected motion), the ambient light threshold (so lights only turn on when the room is below a certain brightness level), and the sensitivity of the motion sensor. These settings are adjusted via dip switches or programming buttons on the unit itself, allowing for fine-tuning to match the specific usage patterns of a space like a private office, conference room, storage area, or restroom.

Power is supplied by two long-life lithium batteries, providing several years of operation under normal conditions before replacement is needed, which minimizes maintenance. The PHPM-WBX-120 integrates seamlessly into larger Lutron radio frequency control ecosystems, allowing for the creation of coordinated multi-sensor lighting control schemes from a central system. By automating lighting based on actual room usage, this sensor significantly reduces wasted energy from lights left on in unoccupied spaces, contributing to lower electricity costs and supporting sustainability goals while providing hands-free convenience.