WattStopper DSW-301-W Dual Tec...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$232.96
$118.31
WattStopper DSW-301-W Dual Tech Wall Switch Occupancy Sensor, 120/277V, White

WattStopper DSW-301-W Dual Technology Wall Switch Occupancy Sensor 120/277V White Automatic Lighting Control

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Model: DSW-301-W
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$232.96
$118.31
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WattStopper DSW-301-W Dual Technology Wall Switch Occupancy Sensor 120/277V White Automatic Lighting Control

Professional dual technology occupancy sensing with advanced control features

The WattStopper DSW-301-W combines dual technology sensing with professional-grade automatic lighting control for reliable occupancy detection. This 120/277V wall switch sensor features white finish and delivers precise coverage with vandal-resistant construction, making it ideal for commercial and institutional applications requiring dependable automated lighting management.

Professional Features & Benefits

  • Dual Technology Sensing: Combines passive infrared and ultrasonic detection for enhanced accuracy and reduced false triggering in challenging environments.
  • 120/277V Universal Voltage: Compatible with standard commercial lighting systems, providing flexible installation options across various applications.
  • Zero-Crossing Relay Technology: Extends relay life significantly by switching at optimal electrical points, reducing maintenance costs and improving long-term reliability.
  • Four Occupancy Logic Options: Customizable control modes allow precise adaptation to specific application requirements and user preferences.
  • Walk-Through Mode: Intelligent 3-minute shutoff with 30-second motion detection prevents unnecessary lighting in brief occupancy scenarios.
  • Vandal Resistant Lens: Durable construction combines precise coverage patterns with resistance to tampering and damage in high-traffic areas.
  • Test Mode Operation: Enables quick and easy sensor adjustments during installation and commissioning for optimal performance tuning.

Technical Specifications

  • Country Of Origin: China
  • Product Color: White
  • Product Depth Us: 5.0 in
  • Product Height Us: 2.5 in
  • Product Volume Us: 37.5 cu in
  • Product Weight Us: 0.45 lb
  • Product Width Us: 3.0 in

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Conference and Meeting Rooms
  • Hospitality Properties
  • Government Buildings

Why Choose WattStopper Quality?

WattStopper delivers proven reliability in occupancy sensing technology with vandal-resistant construction and zero-crossing relay design for extended service life. The selectable audible alert and automatic mode features demonstrate the brand's commitment to user-friendly operation while maintaining professional-grade performance standards.

Manufacturer Resources

Product Specs

Country Of Origin:
China
Product Color:
White
Product Depth Us:
5.0 in
Product Height Us:
2.5 in
Product Volume Us:
37.5 cu in
Product Weight Us:
0.45 lb
Product Width Us:
3.0 in

WattStopper DSW-301-W – Frequently Asked Questions

1) Will the WattStopper DSW-301-W work on a 277V lighting circuit, or do I need a separate model for 120V?
One part covers both. The DSW-301-W is a universal voltage wall switch sensor rated 120/277V, so the same sensor goes in whether the branch circuit at that room is 120V or 277V. That matters on commercial jobs where corridor and office lighting sits on 277V and the receptacle-adjacent switch legs are 120V, you stock one SKU instead of two.
2) What does dual technology mean on a wall switch occupancy sensor, and when should I use it instead of a PIR-only sensor?
Dual technology means the DSW-301-W uses passive infrared and ultrasonic detection together rather than one alone. PIR needs a clear line of sight to a moving heat source, so it drops out in rooms with partitions, tall furniture, or an occupant sitting still at a desk. Ultrasonic picks up minor motion and works around obstructions but can react to air movement. Combining the two cuts false triggering and false shutoffs. Use dual tech in private offices, conference rooms, restrooms with stalls, and classrooms where people go quiet. A PIR-only switch is fine for a storage room or a small open space where motion is obvious and the door is in view.
3) Does the WattStopper DSW-301-W fit in a standard single gang switch box?
The DSW-301-W is a wall switch sensor, meaning it replaces the existing toggle or decorator switch in the box and mounts to the same strap position behind a standard decorator style plate. Body dimensions are 5.0 in deep, 3.0 in wide, and 2.5 in high, with a listed volume of 37.5 cu in, so on a retrofit the deciding factor is box depth and how much conductor volume is already in there, not the wall opening. Shallow or crowded single gang boxes on older commercial retrofits are where this gets tight.
4) Can the DSW-301-W be set to manual on so the lights do not come on by themselves when someone walks in?
The sensor carries four selectable occupancy logic options plus an automatic mode, so how it turns on is a commissioning choice rather than a fixed behavior. That is the setting to pick when a space needs manual on and automatic off, common in offices and conference rooms where daylight often makes automatic turn on unwanted. Set the logic at install using test mode, which speeds up the timers so you can verify coverage and shutoff behavior without waiting out the real delay.
5) I have people walking through a corridor and the lights stay on too long. Can this sensor handle brief pass-through traffic?
That is exactly what walk-through mode on the DSW-301-W is for. If motion is detected only within the first 30 seconds after the space is entered and nothing follows, the sensor shuts the lights off after 3 minutes instead of running the full occupancy time out. Someone grabbing a file and leaving does not burn a full delay cycle. If the space stays occupied past that first window, normal occupancy timing takes over.
6) Will an occupancy sensor like this hold up in a school corridor or a public restroom where it gets abused?
The DSW-301-W uses a vandal resistant lens, which is the part that normally fails first on a wall sensor. Standard sensor lenses are soft and get gouged, pried, or taped over, and once the lens is damaged the coverage pattern is gone even though the sensor still powers up. This one is built for high traffic areas, which is why it shows up in schools, government buildings, and healthcare corridors.
7) What is the exact part number to order for the white WattStopper dual tech wall switch sensor?
Order DSW-301-W. That is the WattStopper manufacturer part number for the dual technology wall switch occupancy sensor in white at 120/277V. The W suffix is the white finish, and it is the only configuration this model is built in.
8) How long will the relay in this occupancy sensor last before it needs replacing?
The DSW-301-W uses a zero-crossing relay, which closes and opens the contacts at the point in the AC waveform where current is at zero. That avoids the arc that pits contacts on a standard relay, so relay life is extended and the sensor survives far more switching cycles. It matters most on spaces that cycle constantly, corridors, restrooms, copy rooms, where a cheaper sensor is a maintenance callback in a couple of years.
9) What color is the WattStopper DSW-301-W, and will it match the other devices in the room?
White. The DSW-301-W is a white sensor, so it matches white decorator devices and white wall plates already in the space. If the building is standardized on ivory, light almond, or gray devices, this one will read as a mismatch on that wall, worth checking before ordering a batch for a floor.
10) Does the WattStopper DSW-301-W give any warning before it shuts the lights off?
There is a selectable audible alert on the DSW-301-W, so the sensor can chirp before it times out and drops the lights. Turn it on in spaces where occupants sit still and get left in the dark, private offices and conference rooms are the usual ones. Leave it off in libraries, exam rooms, patient areas, and anywhere quiet is part of the spec.
How fast can I get the WattStopper DSW-301-W 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 DSW-301-W come with a warranty?
Absolutely. The WattStopper DSW-301-W 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 DSW-301-W?
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 DSW-301-W from ZenSupply?
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