Ceiling Mount Occupancy Sensor, Dual Tech, Low Voltage

Model: OAC-DT

The Dual Technology sensor’s combination of Ultrasonic and Passive Infrared technologies offers the most complete sensing equipment available today. MicroSet self-adjusting
Dual Technology sensors drastically simplify and reduce a contractor’s installation and adjustment time period.

The MicroSet self-adjusting technology continuously monitors multiple sub-frequencies in the event that if a continuous Doppler shift occurs, such as those created by airflow from an air duct, the sensor will identify the noise as continuous and then block it out of view at a select sub-frequency. It will continue to monitor other sub-frequencies for human motion. This avoids false-activation, while still maintaining the high level of sensitivity that is necessary for sensing minor motion in a changing environment. Separate concurrent time delays for both Passive Infrared and Ultrasonic technologies avoid false activations or deactivations. In Automatic On Mode, the lights turn ON when a person enters the room. In Manual On Mode (-R model only), the lights are turned ON by activating a momentary switch (model # GMDS-*) that is connected to the sensor. When enabled, the daylighting feature (-R models only) prevents lights from turning ON when the room is adequately illuminated by natural light.


Ceiling Mount Occupancy Sensor, Dual Tech, Low Voltage



  • Passive Infrared (PIR) and Ultrasonic (US) 


  • Size: 1.42” H x 4.5” W (36.068mm x 114.3mm)
  • Mounting: Mounts directly to ceiling tile, to a 4” square box and round mud ring or to 4” octagon box


  • Operating temperature: 32°F to 104°F (0°C to 40°C)
  • Relative humidity operating: 20% to 90% non-condensing
  • For indoor use only
  • Housing: Durable, injection molded housing. Polycarbonate resin complies with UL 94V-0


  • Power Requirements:
    • Input:
      • 10-30 VDC from Greengate Switchpack or system
      • Maximum current needed is 25mA per sensor
    • Output:
      • Open collector output to switch up to ten Greengate Switchpacks
      • BAS with Isolated Form C Relay in (-R) model
      • Isolated Form C Relay Ratings: 1A 30 VDC/VAC

Hardware Specifications:

  • LED Indicators:  Red LED for PIR detection; Green LED for Ultrasonic detection

Controls and Performance:

  • Time delays:  Self-adjustable, 15 seconds/test (10 minutes Auto), or Selectable 5, 15, 30 minutes, or Zero Time Delay
  • Coverage:  500, 1000, and 2000 sq. ft.
  • Light sensing level (-R Models):  0 to 300 foot candles


  • cULus Listed - Energy Management Equipment (UL916)
  • FCC Compliant
  • RoHS Compliant
  • MicroSet self-adjusting Time Delay and sensitivity
  • Optional built-in light level sensor  
  • Optional BAS/HVAC isolated relay
  • Products tested to NEMA WD 7 - 2011 Occupancy Motion Sensors Standard
  • Selectable Walk-Through Mode 
  • Dual Relay control