The slim, forked shape of the WFS has been specially developed for the requirements of the labeling process. The design allows the sensor to be mounted directly on the edge of a label dispenser. Difficulty in detecting the label gap is finally eliminated – the sensor’s switching threshold can be taught-in while the label strip is running. This sophisticated operating concept means the sensor can be adjusted to different labels quickly, easily, and reliably. The fast response time guarantees exceptional repeat accuracy.


  • Housing with slim forked shape
  • Simple and precise setting of the switching threshold via IO-Link, teach-in button, or plus/minus buttons
  • Light/dark switching function
  • Fast response time: 50 μs
  • PNP or NPN switching output
  • Plastic housing with IP 65 enclosure rating
  • Smart sensor with integrated IO-Link interface


Functional principle Optical detection principle
Fork width 3 mm
Fork depth 42 mm
MDO Gap between Labels

Size of labels: 2 mm 1)

Light source LED, infrared, Infrared light
Switching frequency 10 kHz 2)
  15 kHz 3)
Response time 50 µs 4)
  46 µs 4)
Connection type Male connector M8, 4-pin
  Cable, 4-wire 2 m
IO-Link functions – / ✔,
Advanced functions
  Time measurement + decentralized debouncing
  High speed counter + decentralized debouncing
1) Depends on the label thickness.
2) With light/dark ratio 1:1.
3) With light/dark ratio 1:1, typical, during teach-in 6 kHz.
4) Signal transit time with resistive load.

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