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Small rectangular plastic sensor with short M8 cable and red LED lens

Sick

SICK WL4-3F3130 Miniature photoelectric sensor PNP

SKU CH-2WVS-3FERM

Miniature photoelectric retro-reflective sensor with PNP output, 10–30 V DC supply, IP67/IP66 rating, and 0.02–3.5 m sensing range

  • Miniature 16 mm x 39.5 mm housing fits tight spaces
  • PinPoint LED gives precise 75 mm spot at 1.5 m
  • PNP dark-switching output handles 100 mA loads
  • IP67 and IP66 rating withstands harsh environments
  • 10–30 V DC supply with 0.5 ms response time

Miniature photoelectric sensor PNP

The SICK WL4-3F3130 is a compact retro-reflective photoelectric sensor with a PNP dark-switching output. It suits automation tasks that need a small rectangular housing and a visible red PinPoint LED beam. The unit operates on 10 V DC to 30 V DC and draws 20 mA. Its IP67 and IP66 ratings allow use in harsh industrial environments. Builders who need a teach-in adjustment or a longer sensing range than 4.5 m should look elsewhere.

M8 cable connector 3-pin 100 mm

The sensor ships with a 100 mm PVC cable terminated in an M8 3-pin connector for quick panel mounting. The 0.14 mm² conductors and 3.4 mm outer diameter fit tight cable routes. Wiring follows standard PNP polarity; incorrect supply polarity or a missing pull-down resistor on the load are the typical installation faults. The housing is ABS plastic with PMMA optics and weighs 30 g.

Sustained load behaviour IP67 IP66

Under continuous operation the sensor maintains a switching frequency of 1,000 Hz with a response time below 0.5 ms. The output handles up to 100 mA and includes circuit protection A, C and D against short circuits and overloads. Operating temperature spans –40 °C to +60 °C without derating. The UL file NRKH E181493 confirms compliance for North American control panels.

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Price $92.99
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Specifications

Product
Brand nameSICK
Model nameSICK WL4-3F3130

Questions about this item

How can I confirm the sensor is operating correctly after connecting it to a 10 V DC supply?

The PinPoint LED emits visible red light at 650 nm; a visible spot of Ø 75 mm at 1.5 m distance shows the beam is active and aligned.

What accessories are included and what must be purchased separately?

The unit ships with a 100 mm PVC cable ending in an M8 3‑pin connector; a reflector and mounting bracket are not included and must be sourced separately.

Which sensing range version should I choose for a 3 m detection distance?

The sensor covers 0.02 m to 3.5 m, so the standard 4.5 m maximum range model handles a 3 m application without needing a different variant.

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