Pass & Seymour Wattstopper WS3...
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Pass & Seymour Wattstopper WS301 PIR Single-Pole Occupancy Sensor, 800W/1200W

Pass & Seymour Wattstopper WS301 PIR Single-Pole Occupancy Sensor, 800W/1200W

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Model: PAS-WS-301-I

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

$109.43
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Pass & Seymour WS301LA Wattstopper PIR Single-Pole Occupancy Sensor, Light Almond

The Pass & Seymour WS301LA is a Wattstopper PIR single pole, single relay occupancy sensor rated 800W at 120V and 1200W at 277V, finished in Light Almond for easy blending into commercial interiors. Passive infrared detection combined with a custom two-tier Fresnel lens delivers reliable coverage down to the desktop level, making this sensor well suited for automatically switching lighting loads in offices, conference rooms, and other enclosed workspaces. Zero crossing switching circuitry and patented voltage drop protection work together to extend relay life and improve long-term reliability in everyday commercial duty cycles.

Key Features

  • Detection Optics: Custom two-tier Fresnel lens enhances PIR detection accuracy at the desktop level for dependable occupancy sensing.
  • Relay Protection: Zero crossing circuitry reduces stress on the relay contacts, resulting in increased sensor life.
  • Daylighting Control: Integrated light level sensor holds connected lighting off when ambient light is above the preset threshold, reducing unnecessary energy use.
  • Voltage Drop Protection: Patented voltage drop protection safeguards the sensor and connected load from nuisance operation.
  • Adjustable Settings: Field-adjustable time delay and sensitivity settings allow the sensor to be tuned to the space it controls.
  • Load Rating: Rated 800W at 120V and 1200W at 277V for single pole, single relay lighting control applications.
  • Finish: Matte Light Almond finish coordinates with standard wiring device and wallplate color schemes.

Technical Specifications

  • Country Of Origin: China
  • Product Finish: Matte
  • Product Height: 2.6 in
  • Product Length: 2.6 in
  • Product Line: Pass & Seymour
  • Product Width: 1.75 in
  • Product Depth: 1.55 in

Typical Applications

  • Private Offices and Individual Workstations
  • Conference and Meeting Rooms
  • Commercial Lighting Control Retrofits
  • Energy-Code-Driven Lighting Automation Projects
  • Single Pole, Single Relay Lighting Circuits

Why Pass & Seymour?

Pass & Seymour brings Wattstopper occupancy sensing technology built around zero crossing relay circuitry and patented voltage drop protection, two design details aimed squarely at long-term reliability in commercial lighting control. The two-tier Fresnel lens and adjustable time delay and sensitivity settings give installers the flexibility to fine-tune detection for the specific space, while the Light Almond finish keeps the WS301LA visually consistent with surrounding devices. For professionals specifying dependable, code-conscious lighting control, the WS301LA is a practical, purpose-built choice.

Manufacturer Resources

Spec Sheet

Product Specs

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

Pass & Seymour PAS-WS-301-I – Frequently Asked Questions

1) Can a Wattstopper WS301 sensor replace an existing wall switch in a private office?
That is exactly what it is built for. The WS301 is a single pole, single relay wall sensor that switches the lighting load in place of a standard toggle switch, with a two-tier Fresnel lens tuned for PIR detection down to desktop level. It suits private offices, conference rooms and other enclosed workspaces, and commercial lighting retrofits are a listed application. Because PIR needs line of sight, it is a poor choice for spaces broken up by partitions or tall furniture.
2) We need an occupancy sensor on a low voltage control circuit, not a switch leg. What should we use instead of the WS301?
The WS301 is a line voltage single pole, single relay sensor rated 800W at 120V and 1200W at 277V, so it is wired in the switch leg. For a low voltage control circuit, the Lithonia Lighting CM-9 is a PIR low voltage occupancy sensor switch rated 12-24V AC/DC. If you need the switching contact included rather than feeding a separate relay panel, the Lithonia CMR-9 is a PIR occupancy sensor with relay.
3) What is a close equivalent to the Wattstopper WS301 wall-mount PIR occupancy sensor from another brand?
The Leviton ODS10-ID is a PIR commercial grade occupancy sensor rated 120/277V AC, the same dual-voltage line-voltage approach as the WS301, which is a PIR single pole, single relay sensor rated 800W at 120V and 1200W at 277V. The Leviton ODC Series ODC0S-I1W is another PIR commercial grade line voltage option. Both are passive infrared like the WS301, so detection behavior depends on line of sight to the occupant rather than sound.
4) We need to cover a large open area, not a private office. Is the WS301 the right sensor?
The WS301 uses a custom two-tier Fresnel lens tuned for desktop-level detection and is aimed at offices, conference rooms, and other enclosed workspaces on a single pole, single relay circuit. For a larger open space, the Leviton ODS10-ID-E is a PIR commercial grade sensor covering 2100 sq. ft. at 120/277V, which is specified by coverage area rather than by enclosed-room optics.
5) Will the WS301 keep lights off when there is enough daylight in the room?
Yes. An integrated light level sensor holds the connected lighting off whenever ambient light is above the preset threshold, so a perimeter office with good glazing will not switch on just because someone walked in. Time delay and sensitivity are both field adjustable, so the sensor can be tuned once it is on the wall.
6) How big is the WS301 sensor body, and will it fit a standard single-gang opening?
The WS301 measures 2.6 in high by 2.6 in long, 1.75 in wide and 1.55 in deep. The 1.55 in depth is the number to check against your box: a shallow existing wall box with a crowded wire bundle behind the old switch is the usual sticking point on a retrofit.
7) What is the difference between a line voltage occupancy sensor like the WS301 and a low voltage sensor?
The WS301 switches the load directly through its own relay at line voltage, 800W at 120V or 1200W at 277V, so it wires in place of the switch with no extra hardware. A low voltage sensor such as the Lithonia CM-9, rated 12-24V AC/DC, instead sends a signal and needs a separate power pack or relay panel to do the switching. Pick line voltage for a single room on one switch leg; pick low voltage when you are feeding a central relay or lighting control panel.
8) What other brands of PIR wall occupancy sensor are comparable to the Wattstopper WS301?
Leviton's ODS10-ID is the closest cross-brand match on electrical ratings, a commercial grade PIR sensor listed at 120/277V AC like the WS301. The ODS10-ID-E adds a published 2100 sq ft coverage figure and comes in black, which is worth knowing if you are matching dark devices. The ODS15-IDW is a self-adaptive commercial grade PIR unit, meaning it tunes its own sensitivity rather than relying on the manual sensitivity adjustment the WS301 gives you. The Lithonia CMR-9 is a PIR sensor with an onboard relay as well.
9) Is the Wattstopper WS301 suitable for meeting an energy code lighting automation requirement?
Energy-code-driven lighting automation is one of the stated applications for the WS301, and it combines occupancy switching with daylight hold-off in one device. What it covers is a single pole, single relay lighting circuit, so a room with multiple switch legs or bi-level switching needs either more sensors or a multi-relay control.
10) Is there an occupancy sensor that adjusts its own sensitivity instead of being set by hand like the WS301?
Yes. The Leviton ODS15-IDW is a PIR self-adaptive commercial grade occupancy sensor, so its response is tuned by the device itself. The Wattstopper WS301 instead uses field-adjustable time delay and sensitivity settings, letting the installer dial in the space directly, plus an integrated light level sensor that holds the lighting off when ambient light is above the preset threshold.
11) We standardize on light almond devices across our buildings. Which occupancy sensors match?
The Wattstopper WS301 is offered in Light Almond (WS-301-LA) alongside Ivory (WS-301-I) and White (WS-301-W), all in a matte finish, so it can be matched to existing wiring device and wallplate colors. Among the comparable commercial PIR sensors, the Leviton ODS10-ID-E is a black device and the Lithonia CM-9 and CMR-9 are white.
12) What colors does the Wattstopper WS301 occupancy sensor come in?
Three: white (WS-301-W), ivory (WS-301-I) and light almond (WS-301-LA). All three carry a matte finish, which keeps the sensor consistent with surrounding matte wiring devices and wallplates rather than standing out in a gloss sheen.
13) Why does the WS301 claim longer relay life than a basic occupancy sensor?
Two design details. Zero crossing switching circuitry times the relay to open and close when the AC waveform passes through zero, which cuts arcing across the contacts. On top of that, patented voltage drop protection guards the sensor and the connected load against nuisance operation. For a property manager standardizing a floor of offices, that is the argument for fewer service calls on the same device.
How fast can I get the Pass & Seymour PAS-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 Pass & Seymour PAS-WS-301-I come with a warranty?
Absolutely. The Pass & Seymour PAS-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 Pass & Seymour PAS-WS-301-I?
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