WattStopper DT-355 Dual Techno...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$347.40
$198.20
WattStopper DT-355 Dual Tech Occupancy Sensor 100-347VAC, Center Mount 360°

WattStopper DT-355 Dual Technology Occupancy Sensor 100-347VAC Center Mount 360� Coverage

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Model: DT-355
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$347.40
$198.20
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WattStopper DT-355 Dual Technology Occupancy Sensor 100-347VAC Center Mount 360� Coverage

Advanced dual technology sensing for comprehensive occupancy detection and energy management

The WattStopper DT-355 Dual Technology Occupancy Sensor delivers professional-grade occupancy detection with 360� center mount coverage and wide voltage compatibility from 100-347VAC. This dual technology sensor combines ultrasonic and passive infrared detection methods for reliable performance across diverse commercial and industrial applications, featuring terminal wiring for quick installation and an architecturally appealing low profile design.

Professional Features & Benefits

  • 100-347VAC Multi-Voltage Operation: Compatible with 120V, 230V single phase, 277V, and 347VAC systems at 50/60Hz for versatile installation flexibility across different electrical configurations.
  • Dual Technology Detection: Combines ultrasonic and passive infrared sensing technologies for enhanced accuracy and reduced false triggering in challenging environments.
  • 360� Center Mount Coverage: Provides comprehensive room monitoring from a single centrally-located sensor position for optimal occupancy detection.
  • Ultrasonic Diffusers: Engineered diffuser design delivers more comprehensive coverage patterns for improved detection reliability.
  • Walk-Through Mode: Intelligent feature increases energy savings potential by distinguishing between brief occupancy and sustained presence.
  • Terminal Wiring Design: Facilitates quick and easy installation with accessible terminal connections for efficient field wiring.
  • Low Profile Architecture: Architecturally appealing design maintains aesthetic appeal while delivering professional performance.

Technical Specifications

  • Country Of Origin: China
  • Product Depth Us: 5.0 in
  • Product Environmental Profile: Yes
  • Product Height Us: 3.0 in
  • Product Volume Us: 71.25 cu in
  • Product Weight Us: 0.45 lb
  • Product Width Us: 4.0 in

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Environments
  • Retail Establishments
  • Industrial Facilities
  • Multi-Tenant Properties
  • Government Buildings

Why Choose WattStopper Quality?

WattStopper delivers proven reliability in occupancy sensing technology with professional-grade construction and comprehensive voltage compatibility. The DT-355's dual technology approach and walk-through mode functionality provide enhanced energy management capabilities, while the low profile design and terminal wiring ensure professional installation results across diverse commercial applications.

Manufacturer Resources

Product Specs

Country Of Origin:
China
Product Depth Us:
5.0 in
Product Environmental Profile:
Yes
Product Height Us:
3.0 in
Product Volume Us:
71.25 cu in
Product Weight Us:
0.45 lb
Product Width Us:
4.0 in

WattStopper DT-355 – Frequently Asked Questions

1) Will the WattStopper DT-355 occupancy sensor run on 277V or 347V, or do I need a separate model?
One sensor covers the whole range. The DT-355 accepts 100-347VAC at 50/60Hz, so it wires to 120V, 230V single phase, 277V and 347VAC circuits without a different part number or a separate power pack for voltage matching. That is the reason to spec it on a multi-building or mixed-voltage job: same sensor on the 277V office floors and the 347V areas, one SKU to stock.
2) Should I use a dual technology occupancy sensor or a plain PIR in a room with partitions?
Dual tech is what you want where line of sight is broken. The DT-355 combines passive infrared with ultrasonic sensing, so infrared handles the gross motion it can see and ultrasonic picks up the smaller movement around cubicle walls, bookcases and equipment that blocks a straight sightline. The two technologies together also cut false triggering, which is the failure mode that gets a sensor ripped out of a conference room. A PIR-only sensor is simpler and fine in an open room with clear sightlines; in a partitioned or irregular space it drops occupants who stop moving in view.
3) Where does the DT-355 sensor have to be mounted to get its full coverage?
Center of the room. The DT-355 is a 360 degree center mount sensor, meaning its pattern radiates evenly in all directions from the mounting point, so it is laid out from the middle of the space rather than from a corner or a wall. Put it on a wall or off to one side and you throw away half the pattern. Ultrasonic diffusers spread the coverage out from that center point. If the opening you need to cover is a corridor or a long narrow room, a center mount 360 pattern is the wrong shape for it.
4) How big is the WattStopper DT-355 sensor housing and how far does it hang below the ceiling?
The DT-355 measures 5.0 in deep by 4.0 in wide by 3.0 in high and weighs 0.45 lb. It is a low profile body, so on a finished ceiling in a lobby or an office it sits close rather than dropping down as a visible box. The weight matters for tile ceilings: under half a pound means no supplemental support beyond the mounting the housing provides.
5) Is the DT-355 sensor wired with terminals or pigtail leads?
Terminals. The DT-355 uses a terminal wiring design, so an electrician lands conductors under screws at the sensor instead of splicing to flying leads in the box. On a retrofit where you are pulling the old sensor and reusing the existing conductors, that is faster and it makes a troubleshooting call later a matter of checking a terminal rather than opening a wire nut.
6) What is walk-through mode on a WattStopper occupancy sensor and when does it help?
Walk-through mode separates someone passing through a space from someone actually working in it. If the sensor sees brief occupancy and then nothing, it drops the lights on a short cycle rather than holding the full time delay. The energy case for it is strongest in spaces people cross constantly without stopping: restrooms, copy alcoves, storage rooms, corridor pockets off an open office. In a room where people sit still for long stretches, the standard time delay does more for you than walk-through does.
7) Is the DT-355 appropriate for a healthcare or school ceiling, or is it an industrial-only sensor?
It is specified across both. WattStopper lists the DT-355 for commercial office, educational, healthcare, retail, industrial, multi-tenant and government buildings. For an institutional buyer standardizing a campus, the multi-voltage range is what makes that practical: one sensor part number holds across buildings on different service voltages, so the stockroom carries one item and the maintenance techs learn one device.
8) Does the DT-355 have an environmental product declaration for a green building submittal?
WattStopper publishes an environmental profile for the DT-355, which is the document a project team pulls when a specification asks for material and lifecycle disclosure on the lighting controls package. Country of origin on the sensor is China, which is the other line that usually gets asked for on the same submittal.
How fast can I get the WattStopper DT-355 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the WattStopper DT-355 come with a warranty?
Absolutely. The WattStopper DT-355 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the WattStopper DT-355?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the WattStopper DT-355 from ZenSupply?
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