WattStopper WS-301 PIR Wall Sw...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$76.85
WattStopper WS-301 PIR Wall Switch Occupancy Sensor 120/277V with Light Level Control

WattStopper WS-301 PIR Wall Switch Occupancy Sensor 120/277V with Light Level Control

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Model: WS-301-I

In Stock (leaves warehouse same day if ordered before 3pm ET)

$76.85
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WattStopper WS-301-I PIR Wall Switch Occupancy Sensor 120/277V with Light Level Control

Advanced PIR Detection with Desktop-Level Sensing Technology

The WattStopper WS-301-I PIR Wall Switch Occupancy Sensor delivers professional automatic lighting control with 120/277V compatibility and ivory finish. This advanced occupancy sensor features custom two-tier Fresnel lens technology for enhanced desktop-level detection, adjustable time delay and sensitivity controls, and integrated light level sensing for optimal energy management in commercial and residential applications.

Professional Features & Benefits

  • 120/277V Dual Voltage: Compatible with standard and commercial voltage systems for versatile installation flexibility across residential and commercial applications.
  • Custom Two-Tier Fresnel Lens: Enhanced detection capability specifically optimized for desktop-level sensing, ensuring reliable occupancy detection in office and workspace environments.
  • Adjustable Time Delay and Sensitivity: Customizable settings allow precise tuning for specific room requirements and occupancy patterns, maximizing energy savings while maintaining user comfort.
  • Patented Voltage Drop Protection: Advanced circuitry protects against voltage fluctuations, ensuring consistent performance and extended sensor reliability in varying electrical conditions.
  • Light Level Sensor Technology: Intelligent ambient light detection holds lights off when natural lighting is sufficient, providing automatic daylight harvesting for maximum energy efficiency.
  • Zero Crossing Circuitry: Reduces electrical stress on relay components by switching at optimal voltage points, significantly extending sensor lifespan and reducing maintenance requirements.
  • PIR Motion Detection: Passive infrared technology provides reliable occupancy sensing without false triggers, ensuring accurate lighting control in professional environments.

Technical Specifications

  • Country Of Origin: China
  • Product Color: Ivory

Professional Applications

  • Office Buildings and Professional Workspaces
  • Commercial Facilities and Retail Establishments
  • Educational Institutions and Conference Rooms
  • Healthcare Facilities and Patient Areas
  • Residential Applications and Home Offices
  • Multi-Unit Properties and Common Areas
  • Light Industrial and Warehouse Spaces

Why Choose WattStopper Quality?

WattStopper delivers proven reliability in occupancy sensing technology with patented voltage drop protection and zero crossing circuitry for extended sensor life. The custom two-tier Fresnel lens design and adjustable sensitivity controls provide professional-grade performance, while the integrated light level sensor ensures optimal energy management for sustainable building operations.

Manufacturer Resources

Spec Sheet

Product Specs

Department:
Electrical
Product Subgroup:
Lighting Controls & Sensors
Product Type:
Sensor Switch
Product Group:
Wiring Devices

WattStopper WS-301-I – Frequently Asked Questions

1) Will the WattStopper WS-301 wall switch sensor work on a 277V commercial lighting circuit?
Yes. The WS-301 PIR wall switch occupancy sensor is a dual voltage device rated 120/277V, so it drops into standard residential 120V circuits and commercial 277V lighting branch circuits without a different part number. The color suffix is the only ordering choice: WS-301-I for ivory, WS-301-W for white.
2) Will a PIR wall switch sensor like the WS-301 pick up someone sitting still at a desk?
That is what the lens is built for. The WS-301 uses a custom two-tier Fresnel lens optimized for desktop-level detection, so it is aimed at office and workspace occupancy rather than only large gross motion. Sensitivity and time delay are both adjustable on the unit, so if lights are dropping on a quiet worker you can tune it up rather than replace it. PIR is line-of-sight motion detection, so it needs a clear view of the occupied area, not a partition or a tall file cabinet in the way.
3) Can I use the WS-301 in a daylit room so the lights stay off when there is enough sun?
Yes. The WS-301 includes an integrated light level sensor that holds the lights off when ambient light is already sufficient, so an occupant walking into a bright perimeter office does not trigger the fixtures. That is the feature to specify when a room has significant daylight; without it you get occupancy switching only.
4) What colors does the WattStopper WS-301 occupancy sensor come in?
Two: ivory (WS-301-I) and white (WS-301-W). Those are the full set, so if you are matching existing device plates across a floor of offices, pick the suffix that matches the rest of the openings and order it across the job.
5) Does the WS-301 replace a standard wall switch in a single gang box?
It is a wall switch occupancy sensor, so it takes the place of the manual switch at the door and controls the lighting load automatically. Mounting is the standard switch location rather than a ceiling position, which means coverage is whatever the sensor can see from the wall. For a room with an L shape, a deep alcove, or furniture blocking the wall line of sight, a ceiling mounted sensor covers it better than any wall switch unit.
6) What keeps a wall switch sensor's relay from failing early on a heavy commercial lighting circuit?
The WS-301 uses zero crossing circuitry, which switches the relay at the point in the AC waveform where electrical stress is lowest, plus patented voltage drop protection against fluctuation on the line. Both are aimed at relay life, which is usually what fails first on switching sensors in high cycle spaces like restrooms and conference rooms.
7) Is the WattStopper WS-301 suitable for healthcare and school spaces, or just offices?
It is specified for office buildings and workspaces, commercial and retail, educational institutions and conference rooms, healthcare facilities and patient areas, residential and home office, multi-unit common areas, and light industrial or warehouse space. For an MRO buyer standardizing across a campus, the same model covers those room types on either 120V or 277V.
How fast can I get the WattStopper WS-301-I 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 WS-301-I come with a warranty?
Absolutely. The WattStopper WS-301-I 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 WS-301-I?
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 WS-301-I from ZenSupply?
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