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The WFM fork sensors are extremely quick and easy to mount and commission thanks to plug and play. Their yellow receive indicator can be seen all the way round, providing optimum feedback on the switching behavior of the WFM. Since the sender and receiver are integrated within the same housing, there is no need for any complex alignment work, allowing detection tasks to be prepared and completed quickly and easily. WFM have a rugged aluminum housing and are available in five different designs with fork widths ranging from 30 mm to 180 mm and fork depths of between 40 mm and 120 mm. SICK’s fork sensors are suited to numerous applications, such as detecting parts in production processes, checking whether various objects are present, or intralogistic processes.


  • Clearly visible red emitted light
  • No setup required: The sensor is ready for operation immediately
  • Receive indicator, visible all-round
  • 5 fork sizes with a maximum depth of 120 mm and a maximum width of 180 mm
  • Stable aluminum housing with IP 67 enclosure rating


Functional principle Optical detection principle
Fork width 30 mm . 180 mm
Fork depth 28 mm … 124 mm
MDO 0.8 mm
  3.5 mm
  1 mm
Light source LED, red
Switching frequency 4 kHz 1)
Response time 125 µs 2)
Connection type Cable, 3-wire 2 m
  Cable with MOLEXconnector,4pin2m
  Connector M8, 3-pin
IO-Link functions
Advanced functions
1) With light/dark ratio 1:1.
2) Signal transit time with resistive load.

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