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Dual Tech Occupancy Sensor 100-347VAC, Center Mount 360°

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Wattstopper’s low profile DT-355 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 degrees of coverage.

Color White


  • Architecturally appealing low profile appearance
  • Ultrasonic diffusers give more comprehensive coverage
  • Operates at 120, 230 (single phase), 277 or 347 VAC, 50/60 Hz
  • Terminal wiring for quick and easy installation
  • Walk-through mode increases savings potential


General Info
Product Line Wattstopper
UPC Number 754182913848
Country Of Origin China
Additional Information
Product Environmental Profile Yes


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Questions & Answers

One of the answers to a question asked previously was that a DT-355 Line voltage sensor could be combined with a Radiant 0-10V dimmer on the load side. Is this correct? I am about to order this combination of devices and I want to make sure.

Asked by: John
Hello John, Yes, you can utilize a radiant 0-10v dimmer on the load side of the DT-355 sensor. Please feel free to give us a call if you would like to discuss this configuration further. legrand Contact information: Phone #: 844-957-3783 - Option 1, followed by option 2 for Technical Support. Monday - Friday | 8:00am - 6:00pm Eastern Standard Time (excluding holidays) Best Regards, Technical Support
Answered by: Justin
Date published: 2022-10-25

Can a dimmer switch be incorporated with the occupancy sensor to dim the lights when needed?

Asked by: Mike25
Yes, a line voltage switch/dimmer can be added to the load side of the DT-355.
Answered by: Tier 1 Tech Support
Date published: 2022-08-29

Do you have a sensor rated to 0F ?

Asked by: Anonymous
The CB-100 is a PIR only sensor, which can operated -40 to 95F. Please view attached SPEC sheet
Answered by: Tier 1 Tech Support
Date published: 2022-08-29

What is the maximum distance the occupancy sensor can be from the ground for it to work properly

Asked by: Stephen M Ball
The DT-355 is designed for a ceiling heights of about 8-12 feet from the floor.
Answered by: Legrand Technical Support
Date published: 2022-04-25

Does this sensor cover minor motion? If so, what are the distances for that?

Asked by: JBJB
The DT-355 is a Dual-Technology sensor that has both PIR and Ultrasonic technology built in . The sensor is able to detect major and minor motion up to 1000 sqft when mounted below 10'.
Answered by: Tier 1 Tech Support
Date published: 2022-02-02

We have these thru out our warehouse, but would like the one by the entry door to stay on, is that possible?

Asked by: Anonymous
To override all sensor functions on the DT-355, set the Ultrasonic Sensitivity trimpot to the fully counterclockwise (Service) position. This bypasses the occupancy control functions of the sensor.
Answered by: Tier 1 Tech Support
Date published: 2022-01-12

Hello, is the DT-355 sensor rated for exhaust fans?

Asked by: KB311
No, the DT-355 has no rating for motor loads. I suggest looking at our BZ power packs and a 24v low voltage sensor. BZ power packs are rated for motor loads.
Answered by: Tier 1 Tech Support
Date published: 2021-11-08

Comparing with the other product Ultrasonic Ceiling Occupancy Sensor, 24VDC (W-500A), which sensors would be more suitable for a 150sq.m classroom? Comparing to its technologies, lifetime and price. Thank you.

Asked by: Nelson
Dual technology sensors are most commonly used in this application. They work using a combination of PIR and Ultrasonic technology. As individuals move throughout a given space, Ultrasonic wave analysis and the Doppler effect help detect indirect motion while passive infrared sensors monitor presence directly.
Answered by: Tier 1 Tech Support
Date published: 2021-07-26
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