. _:vb50770295 _:vb50770294 . _:vb50767606 . _:vb50767586 . "Detects the presense of motion in some area using the differential change in infrared intensity between two or more receptors"@en . _:vb50770296 _:vb50770297 . _:vb50770296 _:vb50767606 . _:vb50767606 . _:vb50770298 . _:vb50767586 . . _:vb50770298 . _:vb50770297 . _:vb50770294 _:vb50770296 . "PIR Sensor" . . _:vb50770297 _:vb50770298 . . _:vb50770295 . _:vb50767586 . . _:vb50770298 . _:vb50767586 . _:vb50770298 . _:vb50770294 _:vb50767586 . . _:vb50767606 . _:vb50767606 . . .