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Sensors

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  • Ultrasonic Bi-Level Dimming Daylight Sensor, Factory Installed
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    Ultrasonic Bi-Level Dimming Daylight Sensor, Factory Installed

    WM-OPT-SEN-2US-DAYLIGHT
    $99.85
    Energy-Efficient Lighting Solution with Ultrasonic Bi-Level Dimming and Daylight Sensor Introducing the factory installed ultrasonic bi-level dimming daylight sensor, perfectly engineered for enhanced energy-efficient lighting control. Its intelligent...
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  • Bi-Level Motion Sensor 120V-480V PIR IP65
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    Bi-Level Motion Sensor, 120V-480V PIR IP65, Remote Capable (Optional Remote Control WEC-3RC)

    WM-WEC-3PDR-48-480V
    $78.45
    MSRP: $87.78
    Bi-Level Motion Sensor for Enhanced Energy Efficiency The Bi-Level Motion Sensor with a voltage range of 120V-480V is an innovative solution for reliable motion detection in various environments. Engineered with cutting-edge PIR technology and an IP65...
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    $78.45
    MSRP: $87.78
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  • Split Microwave Sensor for Bluetooth Mesh
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    Split Microwave Sensor for Bluetooth Mesh

    WM-WEC-2MDBTH-36
    $68.45
    MSRP: $76.78
    Introducing the WEC-2MDBTH-36 Split Microwave Sensor The WEC-2MDBTH-36 Split Microwave Sensor is a trailblazing addition to our smart lighting accessory range at RelightDepot. This sensor is meticulously designed for indoor settings, seamlessly...
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    $68.45
    MSRP: $76.78
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  • Bluetooth Mesh Microwave Sensor
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    Bluetooth Mesh Microwave Sensor

    WM-WEC-3MBT-72-WH
    $51.30
    MSRP: $57.78
    Improved Performance with the WEC-3MBT-72-WH Microwave Sensor Experience the forefront of lighting technology with the WEC-3MBT-72-WH microwave sensor, designed to provide superior motion detection and seamless integration into your smart lighting...
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    $51.30
    MSRP: $57.78
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  • Twist-Lock Photocell Kit, 480V
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    Twist-Lock Photocell Kit, 480V

    WM-LF3-PCK-480V
    $41.30
    MSRP: $45.78
    480V Twist-Lock Photocell Kit (LF3-PCK-480V) - The Ultimate Solution for Automated Lighting Control Introducing the 480V Twist-Lock Photocell Kit (LF3-PCK-480V), an advanced lighting solution specifically designed to provide automated control and...
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    $41.30
    MSRP: $45.78
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  • Universal Twist-Lock Photocell Kit 120-277V
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    Universal Twist-Lock Photocell Kit 120-277V

    WM-LF3-PCK
    $27.00
    MSRP: $30.78
    Universal Twist-Lock Photocell Kit (LF3-PCK) Welcome to the Universal Twist-Lock Photocell Kit (LF3-PCK), a versatile and essential accessory in our lighting series. Designed to provide automated light control and enhance energy efficiency across a wide...
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    $27.00
    MSRP: $30.78
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  • Westgate Manufacturing PIR Sensor, Auto On/Off When Movement, Max 72 Watt, 4-Inch (10CM) Range, 120D, -20°C TO 40°C Indoor
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    Westgate Manufacturing PIR Sensor, Auto On/Off When Movement, Max 72 Watt, 4-Inch (10CM) Range, 120D, -20C TO 40C Indoor

    WM-UCSENS-PIR
    $14.15
    MSRP: $17.58
    Westgate Manufacturing PIR Sensor (UCSENS-PIR) Introducing the Westgate Manufacturing PIR Sensor (UCSENS-PIR), a pivotal component in Westgate's lineup, designed to revolutionize your lighting control experience. This Passive Infrared Sensor combines...
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    $14.15
    MSRP: $17.58
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  • PIR Motion Sensor with Auto On/Off
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    PIR Motion Sensor with Auto On/Off

    WM-UCSENS-PIR-1
    $21.30
    MSRP: $25.65
    Enhance Your Indoor Lighting with the UCSENS-PIR-1 PIR Motion Sensor The UCSENS-PIR-1 PIR Motion Sensor is an advanced lighting solution tailored for both residential and commercial applications, designed to enhance convenience and energy efficiency...
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    $21.30
    MSRP: $25.65
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  • Westgate Manufacturing Plug-in Photocell
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    Westgate Manufacturing Plug-in Photocell

    WM-TR-PC
    $54.15
    MSRP: $60.78
    Introducing the TR-PC Plug-In Photocell Discover the advanced capabilities of the TR-PC Plug-In Photocell, designed by Westgate Manufacturing. This innovative photocell is an integral part of modern lighting control solutions, recognized for its...
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    $54.15
    MSRP: $60.78
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  • Westgate Manufacturing Plug-in Mechanical Timer Westgate Manufacturing Plug-in Mechanical Timer image 2
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    Westgate Manufacturing Plug-in Mechanical Timer

    WM-TR-MTMR
    $25.74
    MSRP: $28.78
    Introducing the TR-MTMR Plug-In Mechanical Timer Enhance your lighting control experience with the reliable and user-friendly TR-MTMR Plug-In Mechanical Timer from Westgate. This product is part of a renowned series celebrated for its dependable...
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    $25.74
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  • 300 Watt Multi-Tap Landscape Transformer 300 Watt Multi-Tap Landscape Transformer image 2
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    300 Watt Multi-Tap Landscape Transformer

    WM-TR-300W-MT-SS
    $302.70
    MSRP: $336.78
    The Ultimate Landscape Lighting Solution: Westgate TR-300W-MT-SS The Westgate TR-300W-MT-SS is a high-performance multi-tap landscape lighting transformer, engineered to provide outstanding reliability and functionality in various outdoor settings...
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    $302.70
    MSRP: $336.78
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  • Westgate Manufacturing Vacancy & Occupancy PIR Sensor, 180°, 25FT (600Ft.), 120/277V 600/1000W Max, 3-Way, Neutral Req. Westgate Manufacturing Vacancy & Occupancy PIR Sensor, 180°, 25FT (600Ft.), 120/277V 600/1000W Max, 3-Way, Neutral Req.
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    Westgate Manufacturing Vacancy & Occupancy PIR Sensor, 180°, 25FT (600Ft.), 120/277V 600/1000W Max, 3-Way, Neutral Req.

    WM-YM2108-T-W
    $24.15
    MSRP: $26.78
    Discover the Advanced YM2108-T-WG by Westgate Manufacturing Upgrade your lighting control with the YM2108-T-WG Vacancy & Occupancy PIR Sensor from Westgate Manufacturing. This cutting-edge sensor is designed to provide intelligent and efficient...
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    $24.15
    MSRP: $26.78
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  • Westgate Manufacturing Vacancy & Occupancy PIR Sensor, 180°, 30FT (720FT), 120/277V 800/1200W Max, Single Pole, Neutral Req.
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    Westgate Manufacturing Vacancy & Occupancy PIR Sensor, 180°, 30FT (720FT), 120/277V 800/1200W Max, Single Pole, Neutral Req.

    WM-YM2108-W
    $24.15
    MSRP: $26.78
    Revolutionize Your Lighting Experience Introducing the YM2108-W, a cutting-edge Vacancy & Occupancy PIR Sensor designed to transform your lighting setup with unparalleled efficiency and performance. This sensor is part of an innovative series that...
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    $24.15
    MSRP: $26.78
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  • Outdoor Motion Sensor, IP66 Outdoor Motion Sensor, IP66
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    Outdoor Motion Sensor, IP66

    WM-MSO-IP66-I
    $167.00
    MSRP: $185.78
    Enhance Your Outdoor Lighting with the MSO-IP66-I Outdoor Motion Sensor Introducing the MSO-IP66-I Outdoor Motion Sensor, a superior addition to our advanced IP66 series engineered to enhance your outdoor lighting experience. With its combination of...
    Qty in Cart: 0
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    $167.00
    MSRP: $185.78
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  • 600W 0-10V PIR Troffer Sensor with Dip Switch Control
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    600W 0-10V PIR Troffer Sensor with Dip Switch Control

    WM-WEC-2P-44
    $16.45
    MSRP: $18.55
    600W 0-10V PIR Troffer Sensor with adjustable settings via dip switch control, providing optimal energy efficiency and customizable lighting solutions. Key Features and Benefits 600W power capacity for robust performance. 0-10V dimming capability for...
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    $16.45
    MSRP: $18.55
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  • 0-10V Microwave Sensor with Dip Switch, 600W Max, White
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    0-10V Microwave Sensor with Dip Switch, 600W Max, White

    WM-WEC-2MDRH-35
    $39.85
    MSRP: $44.78
    600W max microwave sensor with dip switch, offering seamless integration with 0-10V systems. Adjustable settings for optimized performance. Key Features and Benefits Compatible with 0-10V dimming systems for versatile lighting...
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    $39.85
    MSRP: $44.78
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  • 600W Max. 0-10V Microwave Sensor with Dip Switch, White
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    600W Max. 0-10V Microwave Sensor with Dip Switch, White

    WM-WEC-2MDR-36
    $39.85
    MSRP: $53.06
    WEC-2MDR-36: High-Capacity 600W, 0-10V Microwave Sensor Enhance your lighting efficiency and convenience with the WEC-2MDR-36, a cutting-edge 600W, 0-10V Microwave Sensor designed to meet the demands of modern lighting systems. Featuring advanced...
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    $39.85
    MSRP: $53.06
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  • 600W Max 0-10V Microwave Low-Ceiling Sensor with Dip Switch
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    600W Max 0-10V Microwave Low-Ceiling Sensor with Dip Switch

    WM-WEC-2MD-33
    $28.74
    MSRP: $31.78
    Introducing the WEC-2MD-33: A Cutting-Edge 600W 0-10V Microwave Sensor The WEC-2MD-33 is the ultimate solution for lighting control in low-ceiling applications. Engineered with advanced technology, this 600W Max 0-10V Microwave Sensor ensures precise...
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    $28.74
    MSRP: $31.78
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  • 600W Max, 0-10V Microwave Highbay Sensor Kit (Optional Remote Control WEC-7RC)
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    600W Max, 0-10V Microwave Highbay Sensor Kit (Optional Remote Control WEC-7RC)

    WM-WEC-2MRHB2
    $98.45
    MSRP: $109.78
    Introducing the WEC-2MRHB2 Microwave Highbay Sensor KitUnlock a new level of lighting control with the WEC-2MRHB2, a premium Microwave Highbay Sensor Kit designed for exceptional performance and efficiency. Engineered for seamless integration with 0-10V...
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    $98.45
    MSRP: $109.78
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  • WEC Motion Sensor WEC Motion Sensor
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    Westgate WEC-3PR-60 Motion Sensor

    WM-WEC-3PR-60
    $111.30
    MSRP: $123.78
    Product Overview The WEC-3PR-60 Motion Sensor, exclusively available at RelightDepot.com, sets a new standard in modern lighting control. Utilizing state-of-the-art motion detection technology, this sensor ensures that your lighting is both efficient...
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    $111.30
    MSRP: $123.78
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Adding your products to cart

Occupancy Sensor or Vacancy Sensor: What the Energy Code Requires

The first question on any sensor spec is not the technology, it is the code. ASHRAE 90.1 and California Title 24 both require automatic lighting shutoff in most commercial spaces, and for many room types they specifically require manual-on operation, which means a vacancy sensor rather than an auto-on occupancy sensor. Manufacturer catalogs list their own sensors by model; none of them put the code decision on the category page. Here is the short version, with the usual caveat that the authority having jurisdiction and the adopted code year control the final answer.

Space TypeCommon RequirementWhy
Private offices, small conference roomsVacancy (manual-on, auto-off)Title 24 and 90.1 favor manual-on in enclosed spaces to prevent false-on energy waste
Restrooms, storage, break roomsOccupancy (auto-on, auto-off)Full automatic operation is generally accepted where hands-free switching matters
Classrooms and training roomsVacancy or partial-onPartial-on brings up a fraction of lighting automatically, the rest by manual switch
Warehouse aislesOccupancy with partial-off dimmingCodes increasingly require lights to drop to a low level, not full off, for safety
Corridors and stairwellsOccupancy with partial-offEgress paths typically may not go fully dark while the building is occupied

PIR, Ultrasonic, or Dual Tech: Match the Sensor to the Room

Once the control strategy is set, pick the sensing technology by room geometry rather than by brand loyalty. The three families behave differently around partitions, ceiling heights, and minor motion like typing.

TechnologyHow It DetectsBest ForWatch Out For
PIR (passive infrared)Body heat moving across line of sightOpen rooms, restrooms, high ceilings with lens optionsBlind to motion behind partitions; minor motion range is shorter than major motion range
UltrasonicDoppler shift in reflected sound wavesRestroom stalls, cubicles, L-shaped roomsAirflow from HVAC diffusers can cause false-on; keep away from vents
Dual technologyPIR plus ultrasonic in one unitClassrooms, conference rooms, spaces where false triggers are costlyHigher unit cost; confirm which technology is required to hold lights on

Coverage is stated per model as major and minor motion areas. Typical wall switch occupancy sensors cover on the order of 900 square feet of major motion in an open room; ceiling mounted units extend that with 360 degree lenses and are the right call for warehouses, gyms, and open offices. Always check the minor motion figure for desk work areas, since a sensor that only sees walking motion will time out on a room full of people typing.

Wall Switch Motion Sensor Switches

The fastest retrofit in the building is replacing a standard toggle with a motion sensor light switch. Wall switch occupancy and vacancy sensors install in the existing box, need no ceiling wiring, and immediately capture savings in offices, restrooms, and conference rooms. Check three things before ordering: whether the model requires a neutral conductor, the load types it supports (LED and electronic ballast loads are the norm now), and whether you need single pole or 3-way compatible units for multi-entry rooms.

Photocells and Rebates

For exterior automation, photocell controls switch on outdoor fixtures at dusk, with shorting cap and twist-lock NEMA options for area lights; see Photocell Controls. Occupancy sensors are also a standard utility rebate measure, so keep model numbers and spec sheets from the product pages for the incentive application. Browse indoor models under Occupancy Sensors, pair them with Dimmers for partial-off strategies, or see Switches and Smart Wiring Devices to complete the controls package.

Frequently Asked Questions

An occupancy sensor turns lights on automatically when it detects a person and off after the space empties. A vacancy sensor only turns lights off automatically; a person must switch them on manually. Energy codes often prefer or require vacancy operation in enclosed spaces like private offices because auto-on wastes energy when daylight is already adequate. Many models ship configurable to either mode.

Under California Title 24 and recent ASHRAE 90.1 editions, enclosed spaces such as private offices, small conference rooms, and classrooms commonly require manual-on control, which means vacancy operation or a partial-on strategy that automatically raises only part of the lighting. Restrooms, storage rooms, and similar spaces generally may use full auto-on occupancy control. The adopted code year and local amendments control, so confirm with the AHJ.

Pick by room geometry. PIR needs line of sight, so it suits open rooms and mounts with clear views. Ultrasonic detection wraps around partitions, making it the choice for restroom stalls and cubicle areas, though HVAC airflow can trigger false-ons. Dual technology combines both and is the safest pick for classrooms and conference rooms where nuisance switching is unacceptable.

Typical wall switch sensors cover roughly 900 square feet of major motion, such as walking, in an open room, with a smaller minor motion zone for desk level movement like typing. Actual coverage depends on the lens pattern and mounting position, and partitions cut PIR coverage sharply. For open areas beyond a single sensor's pattern, step up to ceiling mounted units with 360 degree coverage.

Modern sensors are rated for LED and electronic driver loads, but check two specs. First, the minimum load: some older sensor designs need more connected wattage than a small LED circuit draws. Second, the load type rating on the datasheet should explicitly list LED at your voltage. Models requiring a neutral conductor handle low LED loads more reliably than two-wire designs that leak current through the fixture.

Yes, lighting controls are a standard prescriptive rebate measure in most utility efficiency programs, typically paid per sensor or per controlled watt. Wall switch sensors, ceiling mounted sensors, and fixture integrated sensors usually qualify when they control interior lighting. Keep the model numbers and spec sheets from the product pages; rebate applications generally ask for both, plus the controlled fixture count.

Center the sensor over the area it controls, keep it at least 6 to 8 feet from HVAC diffusers if it uses ultrasonic detection, and avoid mounting where shelving or partitions block the lens pattern. In aisles, place sensors so their major motion coverage overlaps at the ends of each run. Follow the manufacturer's coverage template for the specific lens; patterns differ meaningfully between models.