PLACEMENT GUIDELINES
Depending upon obstacles such as furniture or partitions, 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 4 to 6 feet away from
air supply ducts. Mount the sensor to the ceiling. The DT-355 is designed for
a ceiling height of about 8-10 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.
Open Office Area Coverage:
To get complete coverage in an open office area,
install multiple sensors so that there is approximately 20% overlap with each
adjacent sensor’s ultrasonic coverage area.
Visit our website for FAQs: www.wattstopper.com
Ultrasonic
Coverage
40 ft
(12m)
PIR
Coverage
44 ft
(13.4m)
20%
Ultrasonic
Overlap
Summary of Contents for DT-355
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