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Small rectangular plastic sensor with red LED and M8 connector

Sick

Sick WL8G-P2231S01 Photoelectric Retro-reflective Sensor PNP

SKU CH-FEFF-C7J0N

Compact photoelectric retro-reflective sensor detects transparent objects up to 1.7 m with visible red LED and PNP output

  • Detects transparent objects with polarised retro-reflective sensing
  • Sensing range up to 1.7 m with visible red LED
  • 10–30 V DC supply with PNP light/dark switching
  • IP67 enclosure rating for harsh environments
  • Compact 11 x 31 x 20 mm plastic housing

Industrial Photoelectric Retro-reflective Sensor

The Sick WL8G-P2231S01 is a compact photoelectric retro-reflective sensor with PNP switching output designed for industrial automation. Its rectangular plastic housing measures 11 mm by 31 mm by 20 mm and carries an IP67 enclosure rating. The sensor detects transparent objects using visible red light at 650 nm wavelength.

Sustained Load Behaviour

The sensor operates on a 10 V DC to 30 V DC supply with a maximum power consumption of 30 mA. It delivers a switching frequency of 1,000 Hz and a response time of 0.5 ms for consistent high-speed detection. Output current is limited to 100 mA with circuit protection categories A, B and D. Ambient operating temperature ranges from –25 °C to +55 °C.

Upgrade Path And Fit

This unit replaces older photoelectric sensors that lack transparent object detection or require larger mounting footprints. The M8 4-pin male connector allows direct drop-in installation on existing cable assemblies. Potentiometer adjustment over 270° and selectable light or dark switching simplify retrofit commissioning. Buyers needing longer sensing ranges beyond 3 m or different output logic should consider alternative models.

How it compares

Measured against everything we stock in Electrical Trade Tools & Kits, at today’s prices. Recalculated every night.

Price $102.99
Typical for this category: the median of 5,006 items is $95.99.

Specifications

Product
Brand nameSICK
Model nameSICK WL8G-P2231S01

Questions about this item

How much power does the WL8G-P2231S01 draw when running continuously?

The sensor consumes 30 mA from a 10 V DC to 30 V DC supply, with a ripple tolerance of ±10 %.

What cable or connector must I already have to wire this sensor?

It terminates in a male M8 4-pin connector, so you need a matching female M8 cordset.

Will the sensor fit alongside older 11 mm wide sensors on the same mounting rail?

Yes, the housing is 11 mm wide, 31 mm high and 20 mm deep, matching that common footprint.

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