Ceiling Mount Vacancy Sensor, Dual Tech, Low Voltage

Model: VAC-DT-2000-R, VAC-DT-1000-R, VAC-DT-0501-R

The MicroSet Dual Technology Low Voltage Vacancy Ceiling Sensor increases energy savings by requiring a Manual On input to turn ON the lighting.

The Dual Technology sensor’s combination of Ultrasonic and Passive Infrared technologies offers the most complete sensing equipment available today. This pairing helps eliminate  false deactivations for additional energy savings. 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. The lights are turned ON by activating a  momentary switch (model # GMDS-*) that is connected to the sensor. When enabled, the Daylighting feature prevents lights from turning ON when the room is adequately illuminated by natural light.


Ceiling Mount Vacancy 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


  • Durable, injection molded housing.  
  • Polycarbonate resin complies with UL 94V-0


  • Power Requirements:  120 to 347 VAC, 50/60 Hz - Neutral Required
  • 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


  • 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
  • Requires Manual On for activation