The vacancy sensors provides manual on, auto off functionality. The vacancy sensors use passive infrared technology to detect when a space becomes vacant. The switch operates by sensing the difference between infrared energy from a human being in motion and the background space. The switches provide manual-ON, automatic off operation. Users can manually turn lights on or off at any time by operating the on/off button. The sensors automatically turn lights off after a space becomes vacant and a preset time delay elapses.
Until recently, most occupancy sensors were fully automatic, turning the lights on when someone entered the room and turning them off after they left. For areas where there is a significant amount of light from natural daylight or from spillover from adjacent areas, this can be wasteful as the sensor may be turning the lights on when the occupants might have chosen to leave them off. Now we can off units that are "off only" occupancy sensors, also known as vacancy sensors. This style of sensor offers the maximum of energy savings. Passive Infrared Wall Switch Vacancy Sensors Rating: Incandescent:800W @ 120V Fluorescent:800VA @ 120V Motor:1/4HP @120V Coverage: 180-Degree Features: 120VAC,60H Passive infrared detection technology Pushbutton switch-Manual ON Automatic Off Adjustable time delay from 30 seconds to 30 minutes Adjustable sensitivity settings