Boon Edam Inc. has released the Circlelock Combi mantrap portal solution that prevents unauthorized entry into high-security areas by attaching to existing fire-rated swinging doors. The retrofit option was designed to address unauthorized entrants “piggybacking” behind an authorized person through a swinging door. The cylindrical solution has a single sliding door on one end and an opening on the other end that is mounted to an existing wall and swing door. The Combi uses Boon Edam’s StereoVision2 detection technology in the ceiling to scan the compartment and ensure a user is alone prior to unlocking the swing door. Security managers can choose to prevent piggybacking for inbound and outbound traffic. The Circlelock Combi can process five to six people per minute.