Wall Switch Sensor w/ Convertible Neutral / No Neutral Wiring, Dual Tech


The WSD PDT is an easy to install and simple to use Wall Switch Decorator style occupancy sensor. Utilizing PIR/Microphonics Dual Technology detection, the WSD PDT is ideal for private offices, copy rooms, bathrooms, closets, or any small room with or without obstructions. All WSD PDT Series sensors have a patent-pending wiring method that enables them to function either with or without a neutral connection. Units come pre-configured for wiring without a neutral; however, if connection to neutral is required by code, contractors can convert the unit in seconds.

Key Features

  • Patented Dual Technology with PIR / Microphonics Detection
  • 100% Digital PIR Detection, Excellent RF Immunity
  • Small Motion Detection up to 20 ft
  • Self-Grounding Mounting Strap
  • Green LED Indicator
  • Self-Contained Relay - No Power Pack needed
  • Ultra Low Current Leakage (<0.5 mA) when Connected via Ground
  • Fully meets NEC 2011 Section 404.2C Neutral Requirements
  • No Current Leakage to Ground when Connected via Neutral
  • Interchangeable Hot & Load Wires
  • Impossible to Wire Backwards
  • No Minimum Load Requirements
  • Compatible w/ Electronic & Magnetic Ballasts, CFLs, LEDs, & Incandescents
  • Push-Button Programmable w/o Removing the Switch Plate
  • Photocell standard (disabled by default)
  • LampMaximizer® Minimum On Time (disabled by default)
  • Adjustable Time Delay
  • Non-Volatile Settings Memory
  • Includes Matching Wall Plate


  • Private Office where occupant works w/ back to sensor
  • Restroom with Stalls
  • Storage Rooms with Shelving


SENSOR OPERATION — WSD sensors detect changes in the Passive Infrared (PIR) energy given off by occupants as they move within the field-of-view. WSD sensors with Passive Dual Technology (PDT option) first see motion using Passive Infrared (PIR) and then engage Microphonics to listen for sounds that also indicate continued occupancy. This patented technology dynamically adapts a sensor to its environment by filtering out constant background noise and detecting only noises typical of human activity. In an Auto-On sensor, once occupancy is detected, an internal relay switches on the connected lighting load. In a Vacancy (Manual On) sensor, the unit’s push button must first be pressed to initiate the lights on. All modes are user adjustable (see On Modes section).

After the lights are turned on, an internal timer keeps them on during brief periods of inactivity. Once the time delay has expired, lights are turned off automatically. The default time delay is 10 minutes - chosen in order to maximize energy savings while preventing false-offs. This timer is programmable from 30 seconds to 30 minutes, and is reset every time occupancy is re-detected. Patented LampMaximzer technology is also present in these sensors, providing an additional minimum on time (disabled by default) to be utilized if desired.


  • Physical Specs
    • Weight: 5.00oz
    • Size: 2.74" H x 1.68" W x 1.63" D (6.96 cm x 4.27 cm x 4.14 cm); not including ground strap
    • Mounting: Single Gang Switch Box
    • Mounting Height: 30-48 in (76.2 to 121.9 cm)
    • Color: White, Ivory, Gray, Light Almond, and Black
    • ROHS Compliant
    • Silicone Free
  • Electrical Specs
    • Load Rating (1 Phase Only): 800 W @ 120 VAC, 1200 W @ 277 VAC, 1500 W @ 347 VAC
    • Motor Load: 1/4 HP
    • Minimum Load: None
    • Frequency: 50/60 Hz (Timers are 1.2 times for 50 Hz)
  • Environmental Specs
    • Relative Humidity: 20 to 90% non-condensing
    • Operating Temp: 14º to 85º F (-10° to 29° C)
  • Other
    • UL and CUL Listed
    • California Title 24 Compliant
    • 5 Year Warranty
    • Assembled in the USA
  • Manual On (default)
  • Vacancy only
  • 347 VAC Operating Voltage
  • Color
  • Low Temp / High Humidity