A half‑height turnstile (also known as waist‑high rotor turnstile) is a medium‑security enclosed‑rotor pedestrian barrier within a complete turnstile gate system. Different from open‑frame tripod turnstile with three exposed arms, it adopts an enclosed waist‑high rotating rotor barrier structure, which effectively prevents climbing‑over or crawling‑through unauthorized intrusion. It supports one‑way or bi‑directional passage configuration and works with RFID card, QR‑code, fingerprint and facial‑recognition credential readers. Sintronic half‑height turnstiles have been deployed for overseas access‑control projects including Kuwait and Saudi Arabia pedestrian‑gate reference projects.

Core Working Principle of Half‑Height Turnstile

Sintronic half‑height turnstile follows medium‑security supervised‑access workflow: Credential Validation → Signal Input → Rotor Unlock → Rotation for Passage → Auto‑Reset & Re‑Lock. Full‑cycle operation steps are described as follows.

1. Standby locked status

Under normal standby condition, the enclosed rotor stays mechanically locked, forming solid waist‑high physical barrier against unauthorized crossing. Position sensors keep monitoring rotor angle. LED indicator shows red light and waits for valid authorization signal.

2. Credential verification & signal input

Pedestrians present valid credentials: RFID IC card, QR‑code, fingerprint or facial recognition. After identity validation passes, external reader sends Wiegand or dry‑contact signal to half‑height turnstile main‑control board.

3. Mechanism unlock and rotor rotation

Upon receiving valid pass signal: ‑ Semi‑automatic model: Solenoid lock releases; pedestrian pushes the enclosed rotor to rotate fixed angular displacement for passing. ‑ Fully‑automatic model: Built‑in brushless DC motor drives rotor to rotate automatically without manual pushing.

4. Position sensing and anti‑reverse monitoring

Built‑in position‑feedback sensors track rotor movement angle and rotation direction during passage. If reverse‑direction force or intrusion attempt is detected, control board triggers locking and audio‑visual alarm to deter tailgating or forced reverse entry.

5. Automatic rotor reset and return to locked standby

After completing full valid rotation cycle, position sensor confirms pedestrian passage completion. The rotor automatically resets and re‑locks. LED turns back to red and turnstile returns to standby for next user.

6. Emergency power‑off safety function

When main power supply fails, built‑in fail‑safe mechanism activates. The rotor releases into free‑rotating state, allowing free pedestrian evacuation, complying with public‑building fire‑safety requirements.