Task Lighting & Power, a Hardware Resources company, offers the Doppler Motion Sensor Switch to control lighting even when hidden inside or underneath a cabinet. Unlike traditional infrared sensors that require a direct line of sight to activate, the Task Lighting Doppler Motion Sensor Switch detects movement through any non-metallic barrier up to 2-in. thick (like a cabinet panel) by emitting harmless waves that reflect off nearby objects and back to the detector. The sensor has a 15-foot range of detection, which is ideal for bathroom or closet applications.