WattStopper DW-100-W Dual Tech Wall Switch Occupancy Sensor, 120/277V, White

The DW-100-W dual technology wall switch occupancy sensor runs on either 120V or 277V, so the same part number covers standard 120V tenant spaces and 277V lighting circuits common in commercial buildings. That matters if you're standardizing one sensor across a facility instead of stocking a separate model per voltage.

No. The DW-100-W ships defaulted to Manual-ON, meaning an occupant has to press the switch to turn the lights on; the sensor then handles turning them off when the space empties. Operation is selectable, so it can be changed in the field, along with walk-through, test and presentation modes. If your spec calls for vacancy (manual-on) control, this is already set that way out of the box.

Dual tech means the sensor uses both passive infrared and ultrasonic sensing rather than one alone. The DW-100-W is the dual technology member of a line that also includes PIR-only and ultrasonic-only wall switch sensors. PIR needs line of sight to motion, so it can drop occupants in rooms with partitions or around corners; ultrasonic picks up minor motion but can be triggered by air movement. Dual tech is the choice for restrooms, private offices with furniture obstructions, and conference rooms where someone sits still for long stretches.

It replaces a wall switch in a single-gang opening and measures 5 x 3 x 2.5 inches overall at 0.4 lb. The depth figure is the part a contractor should check against a shallow or crowded box, since the sensor body sits behind the plate along with your conductors.

Walk-through is one of the selectable modes on the DW-100-W, alongside test and presentation. It's for spaces people enter briefly, a supply closet or a copy room, where you don't want the full time delay burning lights after someone steps in and back out. Presentation mode covers the opposite case, holding lights on in a conference room during a slide presentation when occupants are still. Test mode is what you use at commissioning to verify coverage without waiting out the normal delay.

WattStopper DW-100-W. The DW prefix is the dual technology wall switch family, and the -W suffix is the white finish. Country of origin is China. For distributors matching a submittal, order against DW-100-W exactly, since the PIR-only and ultrasonic-only sensors in the same wall switch line carry different prefixes.

Yes, that's the case dual tech is built for. The DW-100-W is specified as high sensitivity with dense coverage, and the ultrasonic half of the sensing picks up small movements such as typing or page turning that a PIR-only sensor can miss once someone settles at a desk. That's what keeps lights from dropping out on a seated occupant.

It's white, with a color-matched lens rather than a contrasting dark PIR window, so it blends with white wall plates and adjacent white switches and receptacles. For a property manager swapping sensors in one room of an existing suite, the face won't read as an odd device on the wall.