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Compact rectangular plastic sensor with M12 connector and included reflector

Sick

Sick WL11G-2B2531P04 Photoelectric Retro-reflective Sensor NPN PNP electrician tool

SKU CH-WSAS-1SY70

Detects transparent objects with polarised retro-reflective sensing, selectable light/dark switching, NPN and PNP outputs, 10–30 V DC supply, IP66/IP67/IP69K enclosure, and includes P250F reflector

  • Detects transparent objects with polarisation filter
  • Switchable NPN or PNP output suits both wiring types
  • IP66 IP67 IP69K enclosure withstands wash-down
  • 10 to 30 V DC supply fits standard control voltage
  • 1500 Hz switching frequency for fast detection

Sick WL11G-2B2531P04 Retro-reflective Sensor

The Sick WL11G-2B2531P04 is a photoelectric retro-reflective sensor designed for industrial detection tasks. It operates on a 10 V DC to 30 V DC supply voltage with a power consumption of 30 mA. The unit offers both NPN and PNP switching outputs selectable via an L/D control cable. It includes a P250F reflector and features a special function for detecting transparent objects.

Suited for Automation

This sensor suits automation engineers needing reliable presence detection for clear or transparent materials in packaging or processing lines. The IP66, IP67 and IP69K enclosure ratings support washdown environments. Buyers requiring through-beam or diffuse sensing modes should look at alternative sensor types. The fixed 330 µs response time and 1,500 Hz switching frequency may not meet ultra-high-speed sorting requirements.

Check Voltage, Wiring and Mounting Compatibility

Verify your control system supplies 10 V DC to 30 V DC and can accept NPN or PNP signals with a 100 mA maximum output current. Confirm the M12 5-pin male connector matches your cable assembly pinout for the L/D control cable function. Ensure the plastic ABS housing and PMMA optics withstand your ambient operating temperature range of –30 °C to +60 °C. The supplied P250F reflector must be mounted within the effective beam range.

How it compares

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Price $158.99
Pricier than about 71% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSICK
Model nameSICK WL11G-2B2531P04

Questions about this item

What supply voltage must my system provide for the WL11G-2B2531P04 to operate?

The sensor requires a DC supply between 10 V and 30 V with a maximum ripple of 5 Vpp and draws up to 30 mA.

Can the sensor share an M12 connector with legacy 4-pin wiring?

No, the WL11G-2B2531P04 uses a 5-pin male M12 connector; a 4-pin cable will not carry both NPN and PNP outputs plus the L/D control wire.

How do I verify the sensor is switching correctly after installation?

With the supplied P250F reflector in place, the yellow output LED toggles each time the beam is interrupted; a 330 µs response time and 1 500 Hz switching frequency confirm normal operation.

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