Telemecanique Fork Level Sensor

Telemecanique Sensors fork sensor (often called a label fork sensor or slot photoelectric sensor) is a precision photoelectric switch used mainly in industrial automation.

a Telemechanique fork sensor

It’s a U-shaped (fork/slot) sensor where:

One side = laser/infrared emitter

Other side = receiver

The object passes between the fork gap

👉 When something enters the gap, it interrupts the beam → output switches ON/OFF

 Example Model (Industrial Standard)

Key Features

Fork gap detection (very accurate)

Detection range: typically 30 mm – 120 mm �

Halltronics

Output: PNP / NPN switching

Fast response time (for high-speed machines)

Protection: IP65 industrial grade 

Halltronics

Compact and easy mounting

 Common Applications

Label detection in packaging machines

Paper / sheet counting

Conveyor systems (object detection)

Bottle / cap detection

Registration mark sensing

👉 Example: In a labeling machine, it detects gap between labels very accurately.

🔧 How it works (simple)

Beam inside fork = normal state

Object enters gap = beam blocked

Sensor output changes → triggers PLC / relay

Wiring (basic idea)

Brown → +24V

Blue → 0V

Black → Output (to PLC or relay)