Add $175.00 for FREE shipping
Shop All!
Automatic Lighting Type
Motion / Occupancy Sensors
Photocell Sensors
Wall Switches, Keypads & Touchscreens Type
Wall Switches & Dimmers
Sensor Type
Motion / Photocell Sensors
Motion / PIR / Occupancy
Photocell Sensor
Load Type
Dimmable Fluorescent
Fluorescent Load
Incandescent / Halogen
Auto-Shut Off
Energy Efficient
LED Feedback
Visual Indicator
# of Gangs
1 Gang
Trim Plate Design
Decora / Paddle
White Finish
Maximum Incandescent Load
800 Watts.
Maximum Power Handling
800 Watts
Trim Plate Styles
Decorator Plates
110V AC
120V AC
277V AC
Ease of Installation
Intermediate (Installs < 60 minutes)
Hubbell Bryant
Other Ways to Shop
On Sale
Order the Smarthome Catalog

Wall Switch Occupancy Sensor Featuring Adaptive Technology
Hubbell Bryant MSU4000W1N Ultrasonic Sensor Auto Control Switch 1-Circuit, White
Hubbell Bryant MSU4000W1N Ultrasonic Sensor Auto Control Switch 1-Circuit, White
Hubbell Bryant MSU4000W1N Ultrasonic Sensor Auto Control Switch 1-Circuit, White
Item# 36852WH
Price: Normally $158.00 
Hot Deal $72.51
Free shipping on orders over $175 - See Details


  • 400 square foot coverage with photocell
  • Single circuit - Auto Control with no button
  • Adaptive technology - Install and forget operation
  • All digital Ultrasonic sensing technology

Essential Info

The Hubbell Bryant MSU4000W1N Ultrasonic Wall Switch Occupancy Sensor is excellent in detecting minor motion near the sensor. It also includes Bryant’s Adaptive Technology which allows you to install and forget, saving time and money from not having to do constant adjustments. This technology also helps eliminate false-offs and disturbances. The sensor automatically turns on the lights when you enter the room.

Ultrasonic (US) technology senses occupancy by bouncing sound waves (32 kHz - 45 kHz) off of objects and detecting a frequency shift between the emitted and reflected sound waves. Movement by a person or object within a space causes a shift in frequency, which the sensor interprets as occupancy. While US occupancy sensors have a limited range, they are excellent at detecting even minor motion such as typing and filing, and they do not require an unobstructed line-of-sight. This makes US technology sensors ideal for an application like an office with cubicles or a restroom with stalls.

  • Adaptive technology - "Install and forget" operation
  • All digital sensing technology
  • Dual 120/277V AC operation. No neutral required
  • Automatic operating mode with no button
  • No minimum load requirements
  • Zero arc point switching
  • Built in photocell with manual super saver mode for daylight harvesting
  • Nylon wallplate included

    The Bryant MSU4000W1N Ultrasonic Sensor Auto Control White Wall Switch is also available in Ivory, sold separately.

  • What's Included

  • 1x - MSU4000W1N Wall Switch Auto Occupancy Sensor, White
  • 1x - Nylon Wallplate
  • 1x - Installation instructions

  • More Info

    Adaptive Technology
    Adaptive Technology is a BRYANT exclusive and delivers benefits to both building owners and occupants. The building owner achieves reduced energy costs, fewer adjustments and less maintenance, and the building occupant experiences fewer false-offs and disturbances. Adaptive technology occupancy sensors use microprocessors that make all the decisions for setting adjustments. Internal software constantly monitors the controlled area and automatically adjusts the sensitivity and timer based on environmental history. Instead of manually adjusting the sensor for seasonal changes, modified airflow, furniture layout or occupancy pattern changes, the sensor automatically adjusts itself. These automatic adjustments eliminate the need for multiple manual adjustments by maintenance personnel or outside contractors. BRYANT offers adaptive technology throughout its product offering - wall switches, ceiling and wall mount sensors in conjunction with dual technology, ultrasonic and passive infrared products.


    ManufacturerHubbell Bryant
    Manufacturer Product NoMSU4000W1N
    Coverage Area400 Square Feet
    CircuitsSingle Circuit
    ControlsAutomatic Only
    Power RequirementsDual 120/277V AC
    Lighting Control800W Incandescent
    1000W Fluorescent at 120V AC
    1800W Fluorescent at 277V AC
    Operational Frequency 50/60 Hz
    Manufacturer WarrantyFive Years Limited
    Certifications cULus, CEC Title 24 Certified

    Important notes:
    Defective exchanges for identical item within 30 days of purchase. After 30 days, please contact the manufacturer.
    Manufacturer contact information: Hubbell Bryant, Tel: (800) 323-2792 Ext


    Related Items

    Sign-up for Exclusive Email offers 
    How to Order Track Your Package Shipping Returns Contact Us Customer Service Retail Store
    Getting Started Learning Center FAQ Dealers Customer Testimonials Affiliate Program
    About Us INSTEON Press Awards Employment Guarantees Security & Privacy
    Free Catalog Email Newsletter Forum RSS Site Map
    Have questions? Call us at 800-762-7846 (Mon-Fri 5am-7pm and Sat 6am-3pm PT) or send us a message
    Place your order by 3pm PT for same day shipping
    Copyright 1995-2014 SMARTHOME™
    Verisign Secure Site PayPal Acceptance Mark