Mechanical operating range adjustment arrangement for passive infra red motion detector, has receiver electronics movably guided on circular path in housing, whose middle point lies in center of lens elements, which lie with maximum range

摘要

The arrangement has a fresnel lens and an associated receiver electronics, which is provided in housing. The receiver electronics is movably guided on a circular path in the housing, whose middle point lies in the center of the lens elements. The lens elements lie with maximum operating range approximately perpendicular in front of a passive infra red sensor (3). The receiver electronics is provided on a passive infra red sensor printed circuit board, which is engaged on a passive infra red holder (2).