Those LED luminaires, which have an integral occupancy sensor
that can control their output through bi-level dimming, were monitored over a period of about a year to evaluate their performance.
performance is heavily dependent on environmental variables, including sensor line-of-sight, mounting height, pole sway, ambient temperature and lensing limitations.
In the late 1990s, a typical office environment included five cables to each office, a cable for an occupancy sensor
, one for voice, one for data, and two spare.
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The occupancy sensor
will trip when the first person arrives, but it can't scan the room an hour later to see if all 30 workers showed up that day.
The wall pack's occupancy sensor
was triggered just once between 12:45 a.
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For example, stairwell luminaires are good targets for replacement to generate energy savings, which can be increased by including an onboard occupancy sensor
for bi-level control.
If the occupancy sensor
signals that the space is occupied but .
For example, an RF occupancy sensor
detects the presence of people and sends an appropriate radio control signal to a wall switch with an embedded RF receiver.
The manufacturer paired its occupancy sensor
and LED dimmer with a light sensor that was built into the LED light poles lining a walkway.