An optical turnstile (also called a speed gate) is a type of turnstile designed to restrict or control access to a building or secure area. Optical turnstiles differ from mechanical turnstiles in that they rely on infrared sensing and are typically barrier-free, instead using audible and visual alerting systems, and sometimes retracting glass panels, to alert others and halt attempted entry by unauthorized individuals.
An optical turnstile (also called a speed gate) is a type of turnstile designed to restrict or control access to a building or secure area. Optical turnstiles differ from mechanical turnstiles in that they rely on infrared sensing and are typically barrier-free, instead using audible and visual alerting systems, and sometimes retracting glass panels, to alert others and halt attempted entry by unauthorized individuals.
Source: Wikipedia "Optical turnstile" · CC BY-SA 4.0
Share this article: X · Bluesky