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Small rectangular plastic sensor with cable and connector

Sick

SICK WL4-3P3030S33 Photoelectric Retro-reflective Sensor PNP

SKU CH-VS6C-NA3GC

A photoelectric retro-reflective sensor with PinPoint LED detects objects up to 4.5 m and switches at 1,000 Hz with PNP output

  • Detects objects up to 4.5 metres away with visible red PinPoint LED
  • Compact 16 mm by 39.5 mm housing fits tight mounting spaces
  • PNP light-switching output delivers 100 mA for direct load control
  • IP67 and IP66 enclosure rating withstands dust and water ingress
  • Operates reliably from –40 °C to +60 °C in harsh environments

SICK WL4-3P3030S33 Photoelectric Sensor

The SICK WL4-3P3030S33 is a photoelectric retro-reflective sensor with a PNP switching output. It uses a visible red PinPoint LED at 650 nm to detect objects across a sensing range of 0.02 m to 3.5 m. The rectangular plastic housing measures 16 mm by 39.5 mm by 12 mm and weighs 30 g. It operates on a 10 V DC to 30 V DC supply voltage with a power consumption of 20 mA.

Ideal for automation engineers needing PNP light

This sensor suits applications requiring a polarised retro-reflective principle with a light spot size of 75 mm at 1.5 m. It is not for buyers who need an adjustable sensitivity potentiometer or a teach-in function for setup. It is also not for systems that require an NPN output configuration or a connector type other than the fitted Tyco plug on the 750 mm cable.

PNP light-switching output with 100 mA capacity

The single specification that decides fit is the PNP light-switching output rated at a maximum of 100 mA. The sensor switches in under 0.5 ms at up to 1,000 Hz and includes circuit protection A, C and D. The IP67 and IP66 enclosure rating allows use in ambient temperatures from –40 °C to +60 °C. UL file numbers NRKH.E181493 and NRKH7.E181493 are noted.

Highlights

  • Detects objects up to 4.5 metres away with visible red PinPoint LED
  • Compact 16 mm by 39.5 mm housing fits tight mounting spaces
  • PNP light-switching output delivers 100 mA for direct load control
  • IP67 and IP66 enclosure rating withstands dust and water ingress
  • Operates reliably from –40 °C to +60 °C in harsh environments

Specifications

BrandSICK
ModelSICK WL4-3P3030S33

Questions about this item

Does the sensor come with a reflector or do I need to buy one separately?

The sensor has a 16 mm x 39.5 mm x 12 mm housing with a 1,750 mm PVC cable and Tyco connector. A retro-reflective target is not included and must be purchased separately.

Should I choose the 4.5 m maximum range or the 3.5 m sensing range for my application?

The 4.5 m figure is the absolute maximum under ideal conditions; the 3.5 m sensing range is the practical operating distance for reliable detection with a standard reflector.

What does the 1,000 Hz switching frequency mean for detection speed on a conveyor?

With a response time under 0.5 ms and 1,000 Hz switching frequency, the sensor can resolve objects passing at intervals of 1 ms, suitable for high-speed counting or positioning tasks.

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