What Is a Turnstile?

A turnstile is a mechanical gate that allows one person through at a time, counting and controlling pedestrian entry. Think of the rotating arm at a subway gate or the glass wings at an office lobby. Turnstiles are the pedestrian counterpart to the vehicle barrier gate: they turn «everyone can walk in» into «only authorized people pass.»

How Turnstiles Control Pedestrian Flow

A turnstile pairs a physical barrier with a logic controller. A credential—RFID card, biometric, QR code, or ticket—unlocks the mechanism for a single passage. The controller logs the event and, on modern units, can flag tailgating (two people trying to follow one open).

Types of Turnstiles

• Tripod turnstile – three rotating arms; the workhorse for factories, gyms, and transit where cost matters. DC servo motorized tripod turnstiles add smooth, quiet, high-cycle operation.
• Flap barrier – retracting flaps; common in office lobbies and stations for a sleek look and fast throughput.
• Swing barrier – swinging glass or metal panels; accessible (wheelchair-friendly) and good for wide lanes. See swing barriers.
• Full-height turnstile – a floor-to-ceiling rotor; the high-security choice for stadiums, prisons, and industrial perimeters. See full-height turnstiles.
• Speed gate – a fast swing or flap lane for premium lobbies; see speed gates.

Tripod vs Flap vs Swing vs Full-Height

Speed Gates for Office Buildings

Speed gates pair glass wings with fast motors and tailgate detection, giving a lobby a premium feel while moving people quickly. They are the default for corporate HQs and data centers.

Biometric & RFID Integration

Most turnstiles accept RFID readers and fingerprint / facial-recognition modules. The reader sits on the turnstile, the controller checks the credential, and the lane opens. Integration with an access-control system (ACS) lets one card policy cover the whole site.

Security Levels & Anti-Tailgating

Tailgating—one credential, two people—is the main weakness of waist-high units. Full-height turnstiles stop it physically; flap/swing/speed gates stop it with infrared sensors and alarms. Choose the level your risk needs.

Frequently Asked Questions

What is a turnstile used for?

A turnstile controls pedestrian entry one person at a time, counting passages and allowing only authorized credentials—used at transit, offices, stadiums, and factories.

Tripod vs flap turnstile—which is better?

Tripods are cheaper and robust for medium security; flaps are faster and sleeker for high-throughput lobbies. Pick tripod for cost and flap for throughput and appearance.

Can turnstiles stop tailgating?

Full-height turnstiles block it physically; flap, swing, and speed gates detect it with sensors and raise an alarm. The right choice depends on your security level.

Do turnstiles support biometric access?

Yes. Most modern turnstiles integrate RFID, fingerprint, and facial-recognition readers through an access-control controller.

Are swing barriers wheelchair accessible?

Yes. Swing barriers open a wide lane and are the standard accessible option for pedestrians with mobility needs.

What is a speed gate?

A speed gate is a fast flap or swing lane with tailgate detection, used in premium lobbies and data centers for quick, secure passage.

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