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An occupancy
sensor is an
energy
conservation
device
designed to detect the presence of human occupants in a
given area. Many commercial, industrial and public
facilities require them for energy saving benefit.
Detecting
activity within a certain area, they provide convenience by
turning lights on automatically when someone enters a room.
They reduce lighting energy use by turning lights off soon
after the last occupant has left the room.
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Occupancy sensors are
"application-sensitive" devices, meaning that most problems in the field are the
result of misapplication. |
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you
should call us first. |
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Lighting Occupancy Sensor
Controls / Occupancy sensors—indoor lighting controls
Contact Us for guidelines that can help with occupancy sensor application:
Occupancy
sensors must be located where they will detect occupants or occupant activity in
all parts of the room. There are two types of occupancy sensors: ultrasonic and
infrared. Ultrasonic sensors detect sound, while infrared sensors detect heat
and motion. In addition to controlling ambient lighting in a room, they are
useful for task lighting applications, such as over kitchen counters. In such
applications, task lights are turned on by the motion of a person washing
dishes, for instance, and automatically turn off a few minutes after the person
stops. |
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Calibrate the sensor. The
sensor will be provided with manufacturer-default settings for
sensitivity to magnitude of motion and time delay before
switching the lights off. The default time delay may be from
30 seconds to 15 minutes. Be sure to calibrate the sensor to
specific conditions in the space for best performance. |
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Lighting occupancy sensors can require a little extra
attention to ensure they are operating correctly after
installation. A professional installer will inform you on how
to minimize the problems. |
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Electrically energy efficient lighting.
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Interference repeatedly causes the occupancy sensor to falsely believe an
occupant is in the room so the lights briefly turn on and then off again
multiple times.
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The principle of operation and benefits of occupancy sensors are well
understood. By turning off the lights when a space is unoccupied, energy savings
can result by eliminating waste. Occupancy sensors can also enhance security and
reduce light pollution.
According to the U.S. Environmental Protection
Agency, energy savings can range from 40 to 46 percent in classrooms, 13 to 50
percent in private offices, 30 to 90 percent in restrooms, 22 to 65 percent in
conference rooms, 30 to 80 percent in corridors, and 45 to 80 percent in storage
areas.
Due to their relative simplicity and high energy
savings, coupled with the requirement in prevailing energy codes for automatic
lighting shut-off, occupancy sensors are rapidly becoming a standard feature in
new buildings and retrofits.
State energy codes in the United States must be at least as stringent as the
ASHRAE/IES 90.1-1999 standard, which requires automatic shut-off of lighting in
commercial buildings greater than 5,000 sq.ft. in size, with few exceptions.
Automatic shut-off can be provided by occupancy sensors or programmable time
scheduling devices. When occupancy in a space is intermittent or not
predictable, occupancy sensors are economical
While today’s occupancy sensors offer robust features, proven utility and
reliability, they remain application-sensitive devices, which requires a
properly educated designer and installer for the controls to be effective. The
right occupancy sensor must be selected, it must be properly located and
installed, and it must be field-calibrated.
Electrical
contractors in and around Philadelphia, PA
lighting, Delaware County, Delco, electrician and electrician
in
Havertown, |
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Trade-Workers
for Heating,
Air-Conditioning, Ventilation and specialized installations.
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The Havertown electrical contractor for
Occupancy Sensors, automatic switch for lighting and energy saving, ceiling
mount, remote control, lights, restrooms, restaurants, public facility, code,
NEC, no hands, code
requirements, building code, electrical code for Philadelphia, PA.
The Able Group
610-853-8311
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Work Done Right, Complete and On Time!
Helping You Know More about the Costs!
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