CHANKO CPY‑LF: Long‑Distance Infrared Laser Background‑Suppression Photoelectric Sensor for Turnstile & Access‑Gate Systems

Discover how CHANKO CPY-LF brings infrared laser background suppression performance to Turnstile Gate Industry Applications.

CHANKO is a professional manufacturer for industrial sensor with more 30+years experience. The CPY-LF series long-distance infrared laser background-suppression photoelectric sensor,built to deliver stable pedestrian detection for turnstile speed-gates, access-control barriers, automatic doors and general industrial presence-sensing tasks.

While conventional diffuse photoelectric sensors frequently suffer false outputs triggered by metal cabinet reflections, wall backgrounds, sunlight interference and varied colour clothing, and traditional through-beam sensors demand strict optical alignment, the CPY-LF leverages triangulation-based background-suppression (BGS) technology. It judges targets by distance instead of reflected light intensity, filtering out rear-background disturbance and achieving zero black-white detection error regardless of target colour.

Key Highlights
Triangulation background suppression (BGS) principle
Infrared laser light source; max sensing distance up to 4 m
Ultra-low blind zone<10 mm
Response time ≤ 100 ms
No black-white error, immune to color interference
Light interference suppression
Support cascaded output
Switch operation mode (Press and hold the button for 5–8 seconds)
Set sensing distance
Teach-button setup for sensing threshold and Light-ON/Dark-ON mode;
NPN/PNP open-collector output (Representative models: CPY-LF2MN/P3, CPY-LF4MN/P3)
Operating temperature: -25 °C to +55 °C

By combining laser grade BGS detection,simplified teach-in configuration and robust electrical optical anti-interference performance,the CPY-LF helps system integrators and turnstile manufacturers resolve typical field pain points that conventional photoelectric sensors cannot handle.

Built for access-gate passage detection, not just general object sensing

The CPY-LF series is optimised for scenarios where reliable pedestrian recognition is critical. Instead of relying on precise transmitter-receiver alignment, the background-suppression sensor detects pedestrians passing through gate channels while ignoring reflective metal frames and cabinet inner walls. Its teach-button workflow lowers commissioning skill requirements and shortens on-site setup time for integrators.

This makes the CPY-LF ideal for transport-hub turnstile gates office-building and scenic-spot flap-barrier-gates,automatic sliding-door anti-pinch systems,as well as workpiece presence detection on automated conveyor lines with reflective backgrounds.