Mantrap (access control)

[1][2][3][4] Airlocks have a very similar design, allowing free ingress and egress while also restricting airflow.

An intercom and/or video camera are often used to allow the guard to control the trap from a remote location.

[5] Other methods of opening doors include proximity cards or biometric devices such as fingerprint readers or iris recognition scans.

Metal detectors are often built in to prevent the entrance of people carrying weapons.

Turnkey systems are sometimes provided by some suppliers due to the need for specially trained installers.