ACUITY 184K52 347V WSD Series Wall Switch Decorator Style Dual Technology Sensor, Ivory

The WSD PDT Series is a Wall Switch Decorator style Passive Dual Technology (PDT) occupancy sensor. The combination of Passive Infrared and patented Microphonics™ detection allows this sensor to literally see hear occupants. It is ideal for restrooms with stalls, private offices where occupant turns their back to the sensor, or rooms with obstructions. Sensor operation: Sensors with Passive Dual Technology (PDT) first see motion using Passive Infrared (PIR) detection and then engage Microphonics™ to hear sounds that indicate continued occupancy. This patented technology uses automatic gain control (AGC) to dynamically self adapt a sensor to its environment by filtering out constant background noise and detecting only noises typical of human activity. When occupancy is detected, the relay switches the connected load on as dictated by the sensor’s operational settings. An internal timer keeps the lights on during brief periods of inactivity and turns the lights off when it expires. The default time delay is 10 minutes. This timer is programmable from 30 seconds to 20 minutes, and is reset every time occupancy is re-detected. Patented LampMaximzer technology is also present in this sensor, providing an additional minimum on time (disabled by default) to be used if desired. Finally, as an added safety measure, a 10 second grace period allows the lights to be voice reactivated after initially shutting off. This state-of-the-art design requires no field calibration or sensitivity adjustments. ON modes: AUTOMATIC ON (default) - Lights come on when occupancy is detected. MANUAL ON - Requires the occupant manually turn on lights via the push-button. REDUCED TURN ON - Sensor is initially set to only detect large motions, effectively ignoring PIR signals reflected off of surfaces, while still sensing occupants when they enter the room. Once lights are on, the sensor returns to maximum sensitivity. SWITCH MODES : PREDICTIVE OFF MODE (default) - This mode allows occupants to turn lights off via the switch without losing the convenience of having the lights automatically turn on when they re-enter the room. Pressing the switch turns the lights off and temporarily disables the occupancy detection in the sensor. After a short exit time delay, the occupancy detection reactivates and monitors for an additional grace period. If no occupancy is detected, the zone will remain in Automatic On operation. If occupancy is detected, the zone will go to a Permanent Off mode, requiring the switch to be pressed again in order to turn the lights on and restore the sensor to Automatic On operation. PERMANENT OFF - Pressing the switch turns the lights and the sensor off. Lights will not come on until switch is pressed again. SWITCH DISABLE - Prevents user from manually turning off the lights via the push-button. Button can still be utilized for programming. VANDAL-RESISTANT LENS (V): Ideal for high abuse or public areas. Decreases detection range by 50%. INHIBIT PHOTOCELL (P): Auto set-point calibration. Photocell prevents lights from turning on if adequate daylight is available, but does not turn lights off.