The Blue Line Gen2 Quad PIR Detector (ISCBPQ2‑W12) uses two individual sensors that operate
like two PIRs in one detector. Each sensor processes
signals separately. Both must activate to generate an
alarm signal. This improves false alarm immunity
relative to a standard PIR, because false alarm sources
such as noise spikes and small animals are ignored.
Quad detectors also provide superior catch
performance versus a standard PIR or dual-technology
detector. They are particularly well suited for
challenging installation situations; for example, cases
where cross catch of intruders cannot be guaranteed
or where intruders are able to cross the detection
pattern very quickly.