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Rectangular plastic sensor housing with cable and reflector bracket

Sick

SICK WL250-2N1131 Photoelectric Retro-reflective Sensor NPN

SKU CH-P1E2-BEJTN

Photoelectric retro-reflective sensor with NPN output, 0.01–15 m sensing range and IP67 enclosure

  • Retro-reflective sensing up to 15 m range
  • Visible red LED simplifies alignment during setup
  • NPN output with selectable light/dark switching
  • IP67 enclosure resists dust and water ingress
  • 2 m PVC cable with 4-wire connection ready to install

Sensing range up to 15 m

The SICK WL250-2N1131 is a photoelectric retro-reflective sensor designed for industrial automation and detection tasks. It uses visible red LED light and a dual-lens optical system to detect objects across distances from 0.01 m to 15 m depending on reflector type. The rectangular ABS housing measures 20 mm by 65 mm by 43.9 mm and includes an IP67 enclosure rating for dust and water protection. It comes supplied with a P250 reflector and BEF-W250 mounting bracket.

NPN switching output with selectable light/dark mode

The sensor provides an NPN switching output rated at a maximum of 100 mA with a response time of 0.5 ms and a switching frequency of 1,000 Hz. Light or dark switching is selectable via the L/D control cable, and sensitivity is adjusted using a two-turn potentiometer. Supply voltage ranges from 10 V DC to 30 V DC with a ripple of 5 Vpp, and power consumption is 20 mA. Connection is made through a 2 m, 4-wire PVC cable with 0.18 mm² conductors.

Operating temperature –25 °C to +55 °C

The unit operates reliably between –25 °C and +55 °C and weighs 150 g. Circuit protection includes safeguards labelled A through D, and the housing meets protection class III. The light spot reaches approximately 260 mm diameter at 8 m distance with a 2° dispersion angle. Optics are made from PMMA plastic. EMC compliance follows EN 60947-5-2.

Highlights

  • Retro-reflective sensing up to 15 m range
  • Visible red LED simplifies alignment during setup
  • NPN output with selectable light/dark switching
  • IP67 enclosure resists dust and water ingress
  • 2 m PVC cable with 4-wire connection ready to install

Specifications

BrandSICK
ModelSICK WL250-2N1131

Questions about this item

What does the 15 m maximum sensing range mean once the sensor is installed in a real machine?

The sensor detects a reflector up to 15 m away under ideal conditions; typical range with the supplied P250 reflector is 13 m, and actual distance depends on alignment, contamination and ambient light.

What does the NPN switching output with a 100 mA limit cap in practice?

The output sinks up to 100 mA at 10–30 V DC, suitable for PLC inputs or small relays; it cannot drive larger contactors or lamps directly without an interposing relay.

What does the 20 mm x 65 mm x 43.9 mm housing with the supplied BEF-W250 bracket need to fit or mount?

The rectangular ABS housing mounts on the included BEF-W250 bracket; allow clearance for the 2 m PVC cable (Ø 3.8 mm) and the 260 mm light spot at 8 m working distance.

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