COVERAGE PATTERN
The DT-305 provides a 360° coverage pattern. The coverage shown represents walking motion at a mounting height of 8-12 feet. For
building spaces with lower levels of activity or with obstacles and barriers, coverage size may decrease. The coverage for PIR ONLY
trigger mode varies with mount height. Refer to pattern below for details. Ultrasonic coverage is roughly the same for 8-12 foot mount
heights. Refer to PIR and Ultrasonic trigger mode coverage for details.
PLACEMENT GUIDELINES
Depending upon obstacles such as furniture or room layout, the area of coverage may be less or more than the sensing distances
shown in the coverage pattern. This must be considered when planning the number of sensors and their placement. It is also
recommended to place the sensor
at least 4 to 6 feet away from air supply vents
.
Mount the sensor to the ceiling. The DT-305 is designed for a ceiling heights of about 8-12 feet. Mounting above or below this range will
significantly affect the coverage patterns. As a general rule, each occupant should be able to clearly view the sensor.
Masking the PIR Lens:
Opaque adhesive tape is supplied so that sections of the PIR lens can be masked. This restricts the sensor’s
view and allows you to eliminate PIR coverage in unwanted areas such as hallways outside of the desired coverage area. Since masking
removes bands of coverage, remember to take this into account when troubleshooting coverage problems. The Ultrasonic coverage
cannot be masked, but you can adjust its sensitivity to reduce the coverage area.
DT-305
version 3
360° Dual Technology • Low Voltage Occupancy Sensor
with Manual On feature
Double technologie à 360° • Détecteur de présence basse tension
avec les fonctionnalité de marche manuelle
Doble tecnología de 360° • Sensor de presencia de bajo voltaje
con función de encendido manual
SPECIFICATIONS
Voltage ............................18-28VDC/VAC, half wave rectified AC
Current Consumption .......................................................25 mA
Power Supply ....................................WattStopper Power Packs
Isolated Relay Rating ........................................1A @30VDC/VAC
Operating Temperature....................... 32° to 131°F (0° to 55°C)
Time Delay Adjustment ......................30 seconds to 30 minutes
Walk-Through Mode ...........3 minutes if no activity after 30 sec
Test Mode ......................................5 sec. upon DIP switch reset
PIR Coverage (Typical) ................................................... 1300 ft2
Sensitivity Adjustment .....High or Low (DIP switch setting)
Ultrasonic Coverage (Typical) ........................................ 1300 ft2
Sensitivity Adjustment .................. Min. to Max. (trimpot)
Frequency............................................................... 40kHz
UL & CUL Listed for use with WattStopper Power Packs
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UNIT DESCRIPTION
The WattStopper DT-305 360° Dual Technology occupancy
sensors combine advanced passive infrared (PIR) and ultrasonic
technologies into one unit. The combination of these technologies
helps to eliminate false triggering problems even in difficult
applications.
The DT-305 turns lighting systems on and off based on
occupancy. The DT-305 provides numerous operating modes that
can be combined to create the ideal custom control. The sensors
can be configured to turn lighting on, and hold it on as long as
either or both technologies detect occupancy. After no movement
is detected for a user specified time (30 seconds to 30 minutes)
the lights are switched off. A “walk-through” mode can turn
lights off after only 3 minutes, if no activity is detected after 30
seconds of an occupancy detection.
The DT-305 operates on 24V, supplied by WattStopper Power Packs.
8ft
(2.4m)
10ft
(3.0m)
12ft
(3.7m)
40ft
(12.2m)
30ft
(9.1m)
40ft
(12.2m)
30ft
(9.1m)
20ft
(6.1m)
20ft
(6.1m)
10ft
(3.0m)
10ft
(3.0m)
0
0
36 ft
(10.97m)
36 ft x 36 ft
(10.97m x 10.97m)
PIR
Coverage
Ultrasonic
Coverage
Drawings
not to scale,
representative
of PIR and
Ultrasonic
Trigger Mode
major motion
coverage
8-12 foot Mounting Height
36'
36'
20%
Ultrasonic
Overlap
Ultrasonic
Coverage
36 ft
(10.97m)
PIR
Coverage
36 ft
(10.97m)
Sensor
20%
Ultrasonic
Overlap
If the space is larger than 30’ x 30’ it will be necessary to
use more than one sensor to ensure complete coverage.
Sensor
36'
36'
Common application: Classroom:
Position the sensor
so that the maximum coverage is achievable. Be sure
that the sensor is not pointing out the door.
Side View
Top View
PIR Only Coverage
