Security Vision offers Turnstile. Security Vision manufactures AC power converters for cameras, DC power converters for cameras, RFID cards and readers, speed diallers, heat sensors, pan tilt units, speed domes, etc. The Turnstile is a component of access control system that physically restricts or allows the personnel movement in an access control system setup. The turnstiles are available in half height and full height versions to suit the seriousness of intent in protecting a premise