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Small rectangular plastic sensor with red lens and cable

Sick

Sick WL4-3P3030S33 Miniature Photoelectric Sensor PNP

SKU CH-TZ7D-9Z4C8

Miniature photoelectric retro-reflective sensor with PNP output, 10–30 V DC supply, IP67/IP66 rating, and 1750 mm cable

  • 16 × 39.5 × 12 mm housing fits tight machine spaces
  • 10–30 V DC supply with PNP output integrates into standard controls
  • PinPoint LED gives 75 mm spot at 1.5 m for precise detection
  • IP67 and IP66 ratings withstand wash-down and dust
  • 40 °C to +60 °C operating range handles extreme environments

Sick WL4-3P3030S33 Photoelectric Sensor

The Sick WL4-3P3030S33 is a miniature photoelectric retro-reflective sensor with a dual-lens design. It operates on a 10 V DC to 30 V DC supply and provides a PNP light-switching output rated at 100 mA. The sensor detects objects from 0.02 m up to 3.5 m using a visible red PinPoint LED at 650 nm. Its compact 16 mm x 39.5 mm x 12 mm ABS housing suits tight installation spaces in industrial automation.

IP67 and IP66 Rated Enclosure

The sensor weighs 30 g and features an enclosure rated IP67 and IP66 for dust and water ingress protection. Power consumption is 20 mA with a ripple below 5 Vpp. Circuit protection includes supply voltage polarity, short-circuit, and transient protection. The operating temperature range spans –40 °C to +60 °C, while storage extends to +75 °C. A 1,750 mm PVC cable with a Tyco connector and 0.14 mm² conductors simplifies wiring.

Sub-Millisecond Response Time

Switching frequency reaches 1,000 Hz with a response time under 0.5 ms for reliable detection in fast processes. The light spot measures Ø 75 mm at a 1.5 m distance, and no manual adjustment is required. Optics are made from PMMA plastic for durability. UL file numbers NRKH.E181493 and NRKH7.E181493 confirm compliance. Buyers needing longer sensing ranges or alternative output types should consider other models.

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Price $89.99
Typical for this category: the median of 5,006 items is $95.99.

Specifications

Product
Brand nameSICK
Model nameSICK WL4-3P3030S33

Questions about this item

How do I mount the 16 mm x 39.5 mm housing and connect the 1750 mm cable with Tyco connector without misaligning the PinPoint LED?

Use two M3 screws on the 16 mm centres, keep the red 650 nm beam perpendicular to the reflector, and route the PVC cable so the Tyco plug seats fully before tightening.

What maintenance will the IP67 rated sensor need after prolonged exposure to –40 °C … +60 °C cycles?

Wipe the PMMA optics with a lint-free cloth when the 75 mm light spot at 1.5 m shows reduced contrast; the PNP output and cable require no scheduled service.

At what distance does the 1000 Hz switching frequency become the limiting factor during continuous operation?

The 0.5 ms response time caps reliable detection at the full 3.5 m sensing range; beyond that the output cannot toggle fast enough for the 1000 Hz rate.

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