A turnstile is a mechanical or electronic access control device used to manage the entry and exit of individuals through an access point. It is often found in high-traffic areas such as public transportation stations, office buildings, and amusement parks.

There are several types of turnstiles, including tripod turnstiles, waist-high turnstiles, full-height turnstiles, and optical turnstiles. Each type has its own unique features and is suitable for different applications.

When selecting a turnstile, important factors to consider include the level of security required, the volume of traffic, the space available, and the environmental conditions at the access point.

Turnstiles can be integrated with various access control systems using different technologies, such as card readers, biometric readers, and mobile devices. This allows for seamless access control and management of authorized personnel.