SRD Secured Revolving Door

The SRD is a different animal from a conventional revolving door. It's a secured revolving door: the rotation, the sensors, and the access control work together so that exactly one authorized person passes per cycle — no tailgating, no piggybacking, no propped doors. For lobbies that need real entrance security without posting a guard, it's one of the most effective options available.

Three models scale the protection: the S2 covers bidirectional tailgate prevention and exit-side unauthorized entry, while the S3 and S4 add sensors that catch piggybacking — two people trying to enter as one. Four standard sensors watch each compartment, voice prompts tell users what to do, and the door can run entry, exit, or bidirectional authentication while tracking occupancy in real time.

As a bonus over a standard revolving door, weather sweeps cut air transfer dramatically, which helps with energy costs and lobby comfort. Installation is handled by certified technicians, and lead times are shorter than you'd expect for this class of equipment. We've seen SRDs go into corporate headquarters, data centers, and government buildings where the entrance has to enforce the access policy by itself.