Passive infrared motion detector for outdoors
PIR 20
BIRCHER REGLOMAT
PIR Motion Detectors do not emit any rays as
indicated by their name Passive Infrared Motion
Detector.When an object with a surface
temperature other than that of the environment
enters the detection area, its heat radiation
is directed via lenses on sensor elements
and triggers a switching operation.
Field adjustment PIR 20
The PIR 20 has 12 Fresnel lenses which are
fitted directly into the cover of the housing.
Two additional masking diaphragms are supplied
with every unit (1 for replacement). This
diaphragms can be clipped into the cover
when required and can be notched or cut out
individually. Thus, each open lens (= 1 field
segment on the floor) can be masked individually.
