243 Stafford St.

Worcester, MA 01603

Tel. 1 (888) 455-2800

Fax 1.508.363.2900


The Business Lighting Experts

Wattstopper DT-305 Low Voltage Dual Technology Ceiling Sensor

SKU: DT-305 | Ordering Code: DT-305  | UPC: 754182913831

Add to Cart
Save to BulbTrack ?

My BulbTrack

Finding the lighting solutions you need might be simple at Bulbs.com, but buying them is even easier. Thanks to our exclusive BulbTrack feature, you can quickly and easily order the products you have purchased in the past or plan to order in the future by simply adding them to your My BulbTrack page. Products are added to your My BulbTrack page when you check out from your shopping cart or add them from the product description pages.

Once a product has been added to My BulbTrack, ordering it is as easy as entering the quantity or clicking on the product image. You can even add notes to each product to record where it is used in your business or home. Make buying your replacement lighting as simple as it should be. Create your BulbTrack today!

In StockReady to ship

This item qualifies for free ground shipping *


The Wattstopper DT-305 low voltage dual technology ceiling sensor combines the benefits of passive infrared (PIR) and ultrasonic technologies to detect occupancy. The sensor has a flat, unobtrusive appearance and provides 360° of coverage. Utilizes a Wattstopper power pack to turn lights on. It can also work with a low voltage switch for manual-on operation.

The DT-305 has the flexible to work in a variety of applications, where one technology alone could cause false triggers. Ideal applications include classrooms, open office spaces, large offices and computer rooms. 

  • Mounts easily to the ceiling or to a junction box
  • Low profile appearance
  • Walk-through mode increases savings potential:  Turns lights off three minutes after the area is initially occupied - ideal for quick visits 
  • Ultrasonic diffusers give more comprehensive coverage
  • Plug terminal wiring for quick and easy installation
  • Accepts low voltage switch for manual-on operation
  • Patented ultrasonic diffusion technology spreads coverage to a wider area
  • LEDs indicate occupancy detection
  • 18-28 VDC/VAC
  • Current consumption @ 24VDC/VAC: 16mA (DC)/69mA (AC)
  • Sensitivity adjustment: High/low (PIR); variable with trim pot (ultrasonic)
Full Specs



Model Number


Line Voltage

Depth (in)

Depth (in)

For fixtures and ballasts, depth is the measurement of total distance from front to back of the product in inches.
Diameter (in)

Diameter (in)

Light bulbs: a measurement of a bulb's width taken at the widest point of the bulb. Fixtures: the measurement across the widest point of a circular fixture.


The decorative finish of the item.


Ceiling tile or 4" J-box

Range of Motion (degrees)



5 year limited
Maximum Current (Amps)

Maximum Current (Amps)

The maximum amount of Amps that a ballast can hold.
Coverage Area (sq ft)

Coverage Area (sq ft)

Maximum amount of space in squre feed that this unit is capable of effectively covering.