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Idiomas disponibles
Installation
7.2 Avoiding false alarms
Influencing factors
Detection
Ambient
temperature
Humidity
Body temperature
Bare skin area/
thickness of cloth-
ing
Speed of move-
ment
Detection angle
Distance from
sensor
Positive effect
Large difference to
body temperature
Low humidity
Large difference to
ambient tempera-
ture
Large bare area/
thin clothing
Fast
90° to the sensor
surface
Low
Negative effect
Small difference to
body temperature
High humidity
Small difference to
ambient tempera-
ture
Small bare area/
thick clothing
Slow
0° / 180° to the
sensor surface
High
Explanation
The sensors work
with the difference
between body
temperature and
ambient tempera-
ture.
Water vapour in the
air absorbs infrared
radiation.
The sensors work
with the difference
between body
temperature and
ambient tempera-
ture.
A greater area that
emits infrared radi-
ation increases the
likelihood that it
will hit the sensors.
Sudden changes in
temperature lead
to a larger signal
swing.
Moving at right an-
gles to the sensor:
high sensitivity.
Moving straight to-
wards the sensor:
low sensitivity.
The closer to the
sensor, the higher
the triggering sen-
sitivity
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