Boly SG520 - PIR Detection Zone

Boly Trail Camera-SG520
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5. PIR Detection Zone
This camera uses a new PIR design, which is patented.
The new PIR’s detection range can reach 85ft in good
environments. The following picture compares the
detection zones of a normal PIR and the new PIR.
The PIR detection angle (α) is just smaller than the field of
view (FOV) angle (β). The advantage of this design is that
it can reduce the empty picture rate and capture most, if
not all, motions.