UNIT DESCRIPTION AND PLACEMENT
Watt Stopper Ultrasonic Sensors are 24VDC switching devices that
automatically switch lighting and HVAC systems off when no motion is sensed
over a given time period. They sense when an area is occupied and turn lights
back on again. Watt Stopper ultrasonic occupancy sensors use the doppler
shift principle to detect occupancy. Motion in the controlled area causes a
slight change in the reflected frequency and amplitude of the broadcast
ultrasonic waves. Watt Stopper sensors then control lighting systems through
Watt Stopper power and auxiliary relay packs.
Placement of the sensor is critical for proper operation. Watt Stopper sensors
are volumetric sensors and sense motion in a 360 degree pattern. It is best to
place the sensor so that it has a clear view of all the desktops or work
surfaces within the coverage area. Also, ultrasonic sensors may false-trigger
when confronted by high volumes of air flow.
Sensors should be installed at
least four feet from most supply ducts and a minimum of six feet from
horizontal discharge ducts.
In addition, do not mount sensor within 6" of
power pack. Always mount the sensor on a rigid, vibration-free surface. When
positioning the sensor make sure the receiver is aimed away from nearest
wall and toward area to be covered.
Call 800.879.8585 for Technical Support
SENSOR COVERAGES
