Next generation presence and ingress/egress monitor based on ST’s latest IR sensor STHS34PF80. Internal ambient temperature compensation and embedded presence detection algorithm promise an ultra-low-power directional people counter . PCB is designed to be powered by an AA-sized, 3.6 V 2400 mAH LiSOCl2 battery, which should last ten years for most applications. Environmental monitoring and anti-tamper/theft sensors included.