Bosch ISC-BPQ2-W12 Blue Line Gen2 Quad PIR Motion DetectorEach sensor processes signals separately. Both must activate to generate an alarm signal. This feature 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