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Ultrasonic Ceiling Occupancy Sensor, 100-347VAC, 2000 sq ft

UT-355-3 Wattstopper
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Wattstopper’s low-profile UT-355 Ultrasonic Line Voltage Ceiling Sensor automatically turns lighting on and off based on occupancy. The sensor mounts on the ceiling with a flat, unobtrusive appearance and provides 360° coverage.
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  • Architecturally appealing low-profile appearance
  • Utilizes advanced, omni-directional, ultrasonic technology
  • Ultrasonic diffusers provide more comprehensive coverage
  • Operates at 120, 230 (single phase), 277 or 347 VAC, 50/60 Hz
  • Terminal wiring for quick and easy installation
  • Walk-through mode increases savings potential


General Info
Product Line Wattstopper
UPC Number 754182915224
Country Of Origin China
Features IR (Infrared), Motion Sensor
Application Sector Commercial
Warranty Type 5-Year
Product Width US 5.0 in
Product Weight US 0.44 lb
Product Volume US 71.25 cu in
Product Depth US 4.75 in
Product Height US 3.0 in
Additional Information
RoHS Conformant Yes This product meets the material restrictions of Article 4 of the RoHS Directive (2011/65/EU), including Commission Delegated Directive 2015/863.
DesignLights Consortium Qualified System Yes
Security   Yes This product is ioXt certified
Product Environmental Profile Yes
Technical Information
Response Frequency 50/60 Hz
Sensor Type Occupancy
Indicator LED Light
Sensing Range Up to 2000 sq ft
Voltage 100 to 347 V
Connection Type Wired


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Questions & Answers

I have (2) 2000 SQF office, 1000 SQF lunch room, 30 feet long hallway, on 8 feet ceiling, what occupancy sensor and power pack should we need for the project? Thanks

Asked by: Jonathan C
Greetings Jonathan, The UT-300-3 is specifically made for hallway applications, it will cover 45' in both directions @8-10ft mounting height. This sensor is compatible with all of our BZ-series power packs.
Answered by: Tier 1 Tech Support
Date published: 2023-07-11

Hello, I want to know if the UT-355 family sensor works with zero crossing technology. Thanks

Asked by: Oscar Godoy
Hello Santiago, Yes the UT-355 uses Zero-crossing for long relay life.
Answered by: Tier 1 Tech Support
Date published: 2023-07-11
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