Leviton Dual-Relay Multi-Techn...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$102.41
Leviton Dual-Relay Multi-Technology Wall Box Occupancy Sensor

Leviton Dual-Relay Multi-Technology Wall Box Occupancy Sensor

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Model: OSSMD-MDW

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

$102.41
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Leviton Dual-Relay Multi-Technology Wall Box Occupancy Sensor

The Leviton Dual-Relay Multi-Technology Wall Box Occupancy Sensor is a no-neutral-wire lighting control designed for commercial and residential spaces that require reliable, code-compliant occupancy-based switching. Built for 120/208/220/230/240/277V, 50/60Hz operation, this dual-relay sensor combines multi-technology detection with CEC Title 20/24 compliance, a 30s-30m adjustable time delay, and ambient light override for energy-efficient, self-adjusting performance. It is field configurable and NAFTA compliant, making it a versatile choice for new construction and retrofit lighting-control projects.

Key Features

  • Dual-Relay Multi-Technology Sensing: Combines two independent relays with multi-technology occupancy detection for accurate, reliable lighting control in a wall box form factor.
  • No Neutral Wire Required: Simplifies installation in existing wall box wiring without a neutral conductor.
  • Wide Voltage Compatibility: Operates on 120/208/220/230/240/277V at 50/60Hz, supporting a broad range of electrical systems.
  • Adjustable Time Delay: Field-configurable 30s-30m time delay setting allows the sensor to be tuned to specific space usage patterns.
  • Ambient Light Override: Automatically factors in existing ambient light levels to prevent unnecessary lighting activation, supporting energy savings.
  • Self-Adjusting Operation: Continuously calibrates sensitivity for consistent detection performance over time.
  • Field Configurable Design: Settings can be adjusted on-site to match the requirements of the installed space.
  • Available Color Options: Offered in Grey, Ivory, and White to coordinate with existing wall box finishes.

Certifications & Compliance

  • CEC Title 20/24 Compliant
  • NAFTA Compliant

Technical Specifications

  • Product Type: Occupancy Sensor
  • Product Color: Gray

Typical Applications

  • Commercial and Industrial Electrical Installations
  • Office, Classroom, and Conference Room Lighting Control
  • Wall Box Occupancy-Based Switching
  • Energy-Code-Driven Retrofit Projects (CEC Title 20/24)
  • New Construction Lighting Control Systems

Why Leviton?

Leviton engineers its occupancy sensors for dependable, code-compliant performance, backed by CEC Title 20/24 compliance and NAFTA-compliant manufacturing. The dual-relay, multi-technology design combined with self-adjusting sensitivity and ambient light override gives professionals a lighting control solution built for consistent, energy-efficient operation across commercial and residential wall box installations.

Manufacturer Resources

Product Specs

Product Type:
Occupancy Sensor
Product Color:
Gray
Department:
Electrical
Product Group:
Wiring Devices
Certifications:
ETL/C-ETL
Sensor Type:
Wall Switch
Device Type:
Occupancy Sensor
Storage Temperature:
-10 To 85 degrees celsius
LED Color:
Red
Country of Origin:
Mexico
Coverage:
2400 square feet
Frequency:
50/60 hertz
Warranty Length:
5 years
Switch Classification:
Dual Relay
Operating Temperature:
0 degrees celsius
Product Subgroup:
Switches

Leviton OSSMD-MDW – Frequently Asked Questions

1) Can I install a Leviton OSSMD occupancy sensor in a wall box that has no neutral wire?
Yes. The OSSMD dual-relay multi-technology wall switch sensor is a no-neutral-wire device, so it drops into older switch boxes where only the hot and switch leg are present. That is the main reason it gets specified on retrofits, where pulling a neutral back to the box means opening walls. Power is 120/208/220/230/240/277V at 50/60Hz, so the same part covers a 120V residential circuit and a 277V commercial lighting branch.
2) How big a room will the Leviton OSSMD wall switch occupancy sensor cover?
Coverage is 2400 square feet, which handles an open office bay, a classroom, or a large conference room from a single switch location. It is a wall box sensor, so that coverage runs out from the switch wall rather than down from the middle of the ceiling. In an L-shaped space or a room with partitions or tall casework blocking the line of sight from the door, a ceiling sensor such as the Pass and Seymour UT3053 ultrasonic (360 degree, 2000 sq ft) or the CI305 low profile PIR (360 degree, 1200 sq ft) gets you around the obstruction.
3) What does the dual relay on the Leviton OSSMD sensor let me do that a single-relay sensor can't?
Two independent relays mean you can switch two separate lighting loads from one occupancy event. That is how classrooms and conference rooms get bi-level or dual-zone control off a single device: inboard and outboard rows on separate relays, or general lighting on one and a secondary load on the other. A single-relay sensor gives you one on/off group. If you only have one circuit to switch, the second relay is capacity you are not using.
4) Does the Leviton OSSMD sensor meet California Title 24 for a lighting retrofit?
The OSSMD is CEC Title 20/24 compliant, which is what gets it accepted on California energy-code work, both retrofit and new construction. It also carries ETL/C-ETL listing, and it's NAFTA compliant, so it clears domestic-preference paperwork on public projects. The ambient light override is part of the code story: the sensor reads daylight already in the space and holds the lights off when there is enough of it.
5) What is the closest dual-technology alternative to the Leviton OSSMD wall box occupancy sensor?
The nearest dual-technology peer is the Pass & Seymour DT300 Wattstopper Dual Technology Ceiling Occupancy Sensor, which pairs two sensing technologies the way the Leviton OSSMD multi-technology sensor does. The difference is where the device lives and how it is powered: the Leviton OSSMD is a wall switch sensor that mounts in the switch box and runs on 120/208/220/230/240/277V, 50/60Hz with no neutral wire required, while the DT300 is a 24V ceiling-mount head with 360 degree coverage that needs a separate low-voltage power pack to switch the load. Choose the OSSMD when you are replacing a wall switch in an existing box; choose the DT300 when the ceiling gives a clearer view of the space than the wall does.
6) Which occupancy sensor covers a larger room, the Leviton OSSMD or the Wattstopper CI305?
The Leviton OSSMD is rated for 2400 square feet of coverage. The Pass & Seymour CI305 Wattstopper low-profile ceiling sensor is a PIR device with 360 degree coverage rated for 1200 square feet. For a large open office or a classroom at the upper end of that range, the OSSMD covers the floor area in a single wall box device; the CI305 suits smaller rooms or gets deployed in multiples across a bigger floor plate. Note also that the CI305 is passive infrared only, so it relies on line of sight to motion, while the OSSMD combines technologies.
7) What should I use instead of a wall box occupancy sensor in a restroom or a room with partitions?
In spaces where partitions, stalls, or furniture block a wall switch's view of the occupant, an ultrasonic ceiling sensor such as the Pass & Seymour UT3053 Wattstopper Ceiling Mount Ultrasonic Occupancy Sensor is the usual substitute. It is a 24V ceiling device with 360 degree coverage rated for 2000 square feet, and ultrasonic sensing detects motion that is not in direct line of sight. The Leviton OSSMD dual-relay multi-technology sensor covers 2400 square feet and is the better fit for an open space where the switch wall looks across the whole room, particularly on a retrofit where no neutral conductor is present in the box.
8) Why does a multi-technology occupancy sensor beat a plain PIR sensor in a private office or restroom?
Passive infrared alone needs motion across its field of view, so it drops the lights on someone sitting still at a desk or standing at a sink behind a partition. Multi-technology detection pairs PIR with a second sensing method, so small or obstructed movement still holds the lights on. The OSSMD is also self-adjusting, meaning it recalibrates sensitivity over time instead of needing a service call when a space gets rearranged. Where the room is broken up badly enough that no wall-mounted device sees it, go to a ceiling dual-tech unit like the Pass and Seymour Wattstopper DT300.
9) How long can I set the Leviton OSSMD to hold the lights on after the room empties?
The time delay is field adjustable from 30 seconds to 30 minutes, set at the device rather than through software or a handheld. Short settings suit restrooms and storage rooms; conference rooms and classrooms usually want the longer end so the lights don't drop during a quiet stretch. A red LED on the face shows detection, which is what you watch while walk-testing the room after you set the delay.
10) What colors does the Leviton OSSMD occupancy sensor come in, and what are the part numbers?
Three colors, one part number each: grey is OSSMD-GDG, ivory is OSSMD-GDI, and white is OSSMD-MDW. Order the color to match the other devices on the wall, since the sensor sits in the switch position and is the first thing anyone looks at. For a facility standardizing across many rooms, pick one and carry it, the sensor is identical across the three.
11) Can a Leviton OSSMD wall switch sensor go in an unheated warehouse or a parking garage?
Watch the temperature. The OSSMD's operating rating is 0 degrees Celsius, so it is an interior, conditioned-space device, not something to hang in an unheated garage, a loading dock, or an exterior vestibule in a cold climate. Storage tolerance is wider, -10 to 85 degrees Celsius, so it survives sitting on a cold jobsite shelf before install, but that is shipping and storage, not running.
12) Should I use a wall switch occupancy sensor or a ceiling mounted one?
A wall box sensor like the Leviton OSSMD replaces the existing switch and needs no new wiring run, which is why it wins on retrofits and small to mid rooms with a clear view from the door. A ceiling sensor sees the whole room from above and is the right call for open plans, rooms with partitions, or spaces where the switch is around a corner, but it needs a separate power pack and a run to it. The ceiling options here are the Pass and Seymour Wattstopper DT300 dual technology and UT3053 ultrasonic, both 24V, 360 degree, and the low profile CI305 PIR at 1200 sq ft.
13) Can a Wattstopper CI305 or UT3053 ceiling sensor replace a Leviton OSSMD one for one in the switch box?
No. The Pass & Seymour CI305 and the UT3053 are both ceiling-mounted heads, and the UT3053 is a 24V device, so neither drops into a wall switch box or switches line voltage on its own. The Leviton OSSMD is a wall switch sensor that operates directly on 120/208/220/230/240/277V at 50/60Hz with no neutral wire required, so it takes the place of the existing switch. Swapping to either ceiling sensor means running low-voltage cable to the ceiling and adding a power pack, plus blanking or repurposing the switch box. If the job is a straight switch replacement, stay with the wall box sensor.
14) Which occupancy sensor should I standardize on for a Title 24 lighting retrofit across a facility?
The Leviton OSSMD dual-relay multi-technology wall box sensor is CEC Title 20/24 compliant, carries ETL/C-ETL certification, and offers a field-adjustable 30 second to 30 minute time delay plus ambient light override, which is the combination most California energy code retrofits are checked against. It is available in Grey, Ivory, and White to match existing device plates across a building. The Pass & Seymour DT300, CI305, and UT3053 Wattstopper sensors are ceiling-mounted and would standardize the facility on low-voltage heads with power packs instead. The deciding factor is usually the existing wiring: the OSSMD needs no neutral in the box, so it goes in wherever there is already a switch.
15) Do any of the Wattstopper ceiling sensors control two lighting circuits like the dual-relay Leviton?
The Leviton OSSMD is a dual-relay device, meaning two independent relays in one wall box unit, so it can switch two loads from a single occupancy signal. The Pass & Seymour DT300, CI305, and UT3053 Wattstopper sensors are sensing heads rather than switching devices, so how many circuits they control depends on the power pack or controller wired behind them rather than on the sensor. If the requirement is two switched circuits from one device at the switch location, the dual-relay OSSMD handles it in the box.
16) Will the lights come on in daylight if I put a Leviton OSSMD in a room with big windows?
Not if there is already enough light. Ambient light override reads the daylight in the space and keeps the load off when the room is bright enough on its own, so a perimeter office or a classroom with a window wall does not burn lamp hours through the middle of the day. Combined with the dual relays, you can put the daylit row on one relay and the interior row on the other.
17) Is the Leviton OSSMD sensor a listed device I can put on a commercial job?
It carries ETL and C-ETL listing, which covers both US and Canadian installs, plus CEC Title 20/24 compliance for California energy code. Manufacturing origin is Mexico and the device is NAFTA compliant. For an institutional submittal package, those are the three lines that usually get asked for.
How fast can I get the Leviton OSSMD-MDW 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 Leviton OSSMD-MDW come with a warranty?
Absolutely. The Leviton OSSMD-MDW 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 Leviton OSSMD-MDW?
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
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