An occupancy detector or presence detector is
markedly different from a motion detector.
An occupancy detector is much
more sensitive and can detect the presence of people not even moving.
An occupancy detector has a so-called Fresnel lens
of high resolution optics, higher gain and thus increasing sensitivity.
The requirements for detecting presence is higher than those for motion.
Occupancy detectors and motion detectors are
both IR detectors (infrared radiation). The construction of these
detectors is such that it is not just enough with a radiation source for
The working principle requires both a
radiation source of a certain size, and that this source moves through
the detector's sensing field.
The best detection is obtained when the radiation
source passes at 90 degrees to the detection fields.
A human being transmits at rest 50-100W, a rather
powerful radiation source and the detector records this in a
Occupancy detector - room
A technique to detect the presence of people and control the lighting/ventilation/air
conditioning in order to save energy.
Detects extremely small movements:
To detect a human being at sleep or human being
sitting still at his/her desk making extremely small movements, it is
essential that you use an occupancy detector.
The detector can include a timing circuit (or
programmed in the controller) that accumulates the latest movements and
automatically extends the time in the output relay.
This period must be as short as possible.
An occupancy detector must function in a
classroom, a conference room and office as well as registrating a
sleeping person in a room where even ventilation and air conditioning is
controlled by the detector. The occupancy detector detects the constant
presence of people.
An occupancy detector/motion detector should
not be used to turn on the lights in rooms where there is daylight.
Anyone who enters the room shall be compelled to
turn on the light, if need be, and then to a level sufficient for the
operation. See light
Today's motion detectors for lighting/ventilation turns on and off
and stops wirelessly and automatically.
AP's motion detectors are the ideal solution for
any room in which it is important to have functional lighting/ventilation
Motion detectors provide safety, convenience
and energy savings as well as automatic lighting control.