A vertical tripod turnstile (vertical 3‑arm turnstile) is a cost‑effective waist‑height pedestrian barrier widely adopted in a complete turnstile gate system. It features a compact vertical cabinet and three stainless‑steel rotating arms spaced at 120‑degree intervals. Working together with access‑control readers including RFID card, fingerprint, QR‑code and facial recognition modules, it enforces one‑person‑per‑passage rules and prevents tail‑gating or unauthorized pedestrian entry. Sintronic vertical tripod turnstiles have been deployed for overseas access‑control projects including Kuwait and Saudi Arabia pedestrian‑gate reference projectsSintronic.

Core Internal Components of Sintronic Vertical Tripod Turnstile

The complete vertical tripod turnstile consists of key functional assemblies:

• Vertical stainless‑steel cabinet: Compact vertical housing for indoor or semi‑outdoor installation.

• Tripod rotating arms: Three 120° separated stainless‑steel barrier rods to block and release pedestrian flow.

• Electromechanical core mechanism: Solenoid lock (semi‑automatic) or brushless motor (fully‑automatic version).

• Control main‑board: Receives verification signal from external access‑control readers.

• Status indicator LED: Shows green for allowed passage and red for access denial.

• Power‑off drop‑arm assembly: Safety component for emergency evacuation under power failure condition.

Core Working Principle of Vertical Tripod Turnstile

Sintronic vertical tripod turnstile follows mature access‑control workflow: Access Credential Verification → Signal Input → Mechanism Unlock → Arm Rotation 120° → Automatic Re‑lock. Full operation steps are described below.

1. Standby locked status

Under normal standby condition, the electromechanical solenoid lock engages. The three tripod arms are firmly locked, blocking pedestrian passage. LED indicator shows red light for no‑access status, waiting for valid authorization signal.

2. Credential verification & signal input

Pedestrians present valid credentials: RFID IC card, QR‑code, fingerprint or face to external reader devices. After identity validation passes, the access‑control reader sends dry‑contact / Wiegand signal to the vertical tripod turnstile main‑control board.

3. Mechanism unlock action

Receiving valid pass signal, the control board releases the solenoid locking mechanism.

• Semi‑automatic model: Lock opens, pedestrian manually pushes tripod arms to rotate 120 degrees to pass.

• Fully‑automatic model: Built‑in brushless motor drives tripod arms to rotate automatically without manual pushing.

4. Passage completion and auto‑reset lock

After one complete 120‑degree rotation finishes, internal position sensor detects passage completion. The tripod mechanism immediately re‑locks automatically. Only one person can pass per single valid authorization, realizing built‑in anti‑tailgating protection. LED turns back to red and the turnstile returns to standby state for next user.

5. Emergency power‑off safety function

When main power supply fails, the drop‑arm safety mechanism activates. Tripod arms drop down horizontally, clearing the passageway for free pedestrian evacuation, complying with public‑building fire‑safety requirements.