Glass Turnstiles
The Optical Barrier Swing Glass turnstile comes with 1/2 inch clear tempered "No Touch" swinging glass. The clear view barriers keep a clean look in the lobby while meeting security standards.
An access card or other credential is presented to the customer supplied access control reader mounted inside the casework. If entry is authorized, the top mounted indicator LEDs will light as a green arrow pointing in the direction authorized and a chime will sound indicating to the user that they may pass.
http://www.orionentrancecontrol.com/Resources/OBSG-HG%20Optical%20Barrier%20Swing%20Glass%20%20Data%20Sheet.pdf