WattStopper® DT-355 Line Voltage Ceiling Mount Occupancy Sensors, 120/230/277/347 VAC, 1000 sq-ft Coverage, 360 deg



WattStopper® DT-355 Line Voltage Ceiling Mount Occupancy Sensors, 120/230/277/347 VAC, 1000 sq-ft Coverage, 360 deg

  • NCE Part No: 215837
  • MPN: DT-355
  • UPC: 75418291384

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PIR technology senses occupancy by detecting the difference between heat emitted from the human body in motion and the background space. Relying on a clear line-of-sight view, passive infrared sensors make 100 percent coverage cut off possible. These sensors utilize a unique fresnel lens which divides the coverage area into zones, enhancing detection of small movement. Using the Doppler principle, ultrasonic sensors work by bouncing ultrasonic sound waves off objects in an area and measuring the time it takes for the waves to return. Movement by a person in the area causes the sound waves to return at a changed frequency, resulting in a Doppler shift and occupancy detection.

WattStopper® Ceiling Mount Occupancy Sensors, Line Voltage, 120/230/277/347 VAC, 0 to 1500 W, Dual Technology (PIR/Ultrasonic) Sensor, 1000 sq-ft Coverage, 360 deg Viewing, 5 to 30 min Delay, LED /Tungsten Lamp, 40 kHz Response, Flying Lead, Auto-On/Off Control Output, Ceiling/Swivel Bracket Mount, 35 deg C, Plastic, White, 4.5 in Dia x 1.02 in D


Voltage Rating      :      120/230/277/347 VAC
special features      :      Dual Technology/ Line Voltage
Sub Brand      :      Wattstopper
Temperature Rating      :      35 deg C
Response Frequency      :      40 kHz
Type      :      Line Voltage
Environmental Conditions      :      95% RH, non-condensing; for indoor use only
Connector      :      Flying Leads
Operating Cycles      :      100M
Control Output      :      Auto-On/Off
Operating Temperature      :      35� C
Target Size      :      1000 sq ft
Enclosure      :      Plastic Housing
Body      :      Plastic Housing
Brand Name      :      Legrand-Wattstopper
Mounting      :      Swivel Bracket
Indicator      :      LED
Load      :      0-1500 W
Supply Voltage      :      24 VDC/VAC
Sensor      :      Dual Technology
Sensing Range      :      1000 sq ft
Standard      :      UL244A, UL508
Application      :      Classrooms, Open Office, Large Offices, Computer Rooms
Coverage      :      1000 sq-ft


  • 95% RH, non-condensing, for indoor use only environmental conditions
  • This low profile dual technology occupancy sensor combines the benefits of passive infrared (PIR) and ultrasonic technologies
  • The sensor mounts on the ceiling with a flat, unobtrusive appearance and provides 360 deg of coverage
  • Detection signature processing eliminates false triggers and provides immunity to RFI and EMI
  • Walk-through mode turns lights-off three minutes after the area is initially occupied - ideal for brief visits such as mail delivery
  • Built-in light level sensor featuring simple, one-step setup
  • Zero crossing for long relay life
  • 1 x 108 operating cycle
  • Ultrasonic diffusion technology spreads coverage to a wider area (patent pending)
  • DIP switch simplifies sensor adjustments
  • LEDs indicate occupancy detection
  • Uses existing line voltage wiring and doesn't require a power pack
  • Six occupancy logic options give users the ability to customize control to meet application needs
  • Ballast load type


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