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Small rectangular metal sensor housing with M12 connector and potentiometer adjustment

Sick

Sick WL12G-3B2531 Photoelectric Sensor NPN PNP

SKU CH-D13P-EQZG9

Compact photoelectric sensor detects transparent objects up to 4 m with selectable NPN or PNP output and IP69K sealing

  • Retro-reflective autocollimation detects transparent objects reliably
  • Visible red LED at 640 nm wavelength
  • Adjustable sensing up to 4 m range
  • IP66 IP67 IP69K metal housing withstands harsh environments
  • Selectable light or dark switching via L/D control

Compact Photoelectric Sensor for Transparent Objects

The SICK WL12G-3B2531 is a rectangular retro-reflective sensor with autocollimation designed to detect transparent objects. It operates on 10 V DC to 30 V DC supply voltage and offers both NPN and PNP switching outputs selectable via an L/D control cable. The housing measures 15.6 mm x 48.5 mm x 42 mm and weighs 120 g.

Sustained Detection Performance

The sensor uses a visible red LED light source at 640 nm wavelength with a 1.5° dispersion angle creating a 25 mm spot at 1.5 m distance. It achieves a maximum sensing range of 4 m with a response time of 330 µs and a switching frequency of 1,500 Hz. Sensitivity is adjusted via an 11-turn potentiometer for precise calibration.

Rugged Enclosure and Thermal Range

The zinc diecast metal housing with PMMA optics carries IP66, IP67 and IP69K enclosure ratings for harsh environments. It operates reliably across an ambient temperature range of –40 °C to +60 °C. Power consumption is 30 mA with circuit protection classes A, C and D, and the unit connects via a 5-pin M12 male connector.

How it compares

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Price $115.99
Pricier than about 57% of the 5,006 comparable items (median $95.99).

Specifications

Product
Brand nameSICK
Model nameSICK WL12G-3B2531

Questions about this item

How much power does the WL12G-3B2531 sensor draw when running continuously?

The sensor consumes 30 mA from a 10 V DC to 30 V DC supply with a ripple of 5 Vpp.

What voltage supply and connector does the WL12G-3B2531 need to operate?

It requires 10 V DC to 30 V DC and connects via a male M12 5-pin connector.

Will the WL12G-3B2531 work with an existing PLC that only accepts NPN outputs?

Yes, the sensor provides both NPN and PNP switching outputs selectable via the L/D control cable.

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