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Ultrasonic Ceiling Occupancy Sensor, 24VDC, 2000 sq ft

UT-305-3 Wattstopper
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Wattstopper’s UT-300 Ultrasonic Ceiling Sensors automatically turn lighting on and off based on occupancy. The sensors mount on the ceiling with a flat, unobtrusive appearance and provides 360° coverage.

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  • Coverage 500-2,000 square feet
  • Available with isolated relay for integration with BAS or HVAC
  • DIP switch simplifies sensor adjustments
  • Patented ultrasonic diffusion technology spreads coverage to a wider area
  • UT-300 Series Sensors work with low-voltage momentary switches for manual control
  • LED indicates occupancy detection
  • Clip mounting system makes ceiling tile installation simple


General Info
Product Line Wattstopper
UPC Number 754182915194
Country Of Origin China
Features Indicator Lights
Application Sector Commercial
Product Width US 4.0 in
Product Weight US 0.35 lb
Product Volume US 44.55 cu in
Product Depth US 4.5 in
Product Height US 2.2 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
Sensor Type Occupancy
Amperage 35 A
Indicator LED Light
Sensing Range 2000 sq ft
Voltage 24.0 V
Connection Type Wired



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Questions & Answers

The sensitivity control does not seem to be working correctly. Full CCW works but as you turn the control CW, it seems to not work.This unit controls the lights and a exhaust fan.The panel that the unit is on has some vibration from the exhaust fan nearby

Asked by: Leo Schaaf
If the unit is vibrating, I suspect that is the problem. Once you take the sensor out of service mode, the sensor is again active (at varying degrees of sensitivity depending upon how far CW you adjust the trim pot), but due to the vibration, the sensor sees everything moving and will hold the lights ON.
Answered by: Tier 1 Tech Support
Date published: 2024-02-21

on the UT-305-3 what size hole is recommended to be cut into ceiling tiles ?

Asked by: Anonymous
If you are mounting directly to the ceiling, the installation manual suggests a 3.5 to 4 inch round hole or it can be mounted into a standard octagonal J -Box.
Answered by: Tier 1 Tech Support
Date published: 2023-09-05

Please advise how can we install UT-305-3 as surface mount installation. What accessories do we need for surface mount installation.

Asked by: Mohammed Kazim
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