SICK Retroreflective Photoelectric Sensor, Block Sensor, 2 m, PNP, IP66, IP67, IP69K

SICK W12-3 Series Photoelectric Sensor, IP66/IP67/IP69K, 30V Maximum DC Voltage - WL12-3P2451

This photoelectric sensor is a Compact retroreflective LED device designed for industrial detection tasks where small-object sensing and short-range reliable switching are required. It operates from low-voltage DC supplies and connects via a 4-pin M12 plug, offering robust ingress protection for demanding production and machine environments.

Features & Benefits

• PNP complementary output provides straightforward Interface with controllers
  Response time 330μs enables high-speed object detection
  Operating range up to 1.3m with focused beam for small-part detection
  Current consumption 30mA limits power draw in distributed systems
  Wide temperature tolerance from −40 to +60 °C for harsh workplaces
  Metal housing with IP66/IP67/IP69K rating resists washdown and contaminants

**Applications**

• Suitable for pick-and-place systems detecting miniature components
  Ideal for conveyor edge detection in food-processing lines
  Used with PLCs requiring fast light/dark switching
  Can be used for presence checks in robotic end-of-arm tooling
  Suitable for inspection stations with reflective targets

What type of light source and Wavelength does it use?

It emits visible red light from an LED with a Wavelength of 640nm and a focused illumination pattern.

How is sensitivity adjusted on the unit?

Sensitivity is set using a five-turn potentiometer, with Visual indication from an LED showing received light status.

What electrical protections are incorporated?

The device includes reverse-polarity protection on supply lines, interference suppression, and output overcurrent/short-circuit protection depending on wiring.

Which connector and wiring format are provided?

Connection is via a male M12 4-pin connector configured for standard PNP wiring and signal levels compatible with 10–30 V DC supplies.

What reliability metrics support long-term use?

The sensor lists an MTTF D Value of 1,388 years and an LED service life of approximately 100,000 h at 25°C for continuous operation.

Notes

Product details cover the whole product family. For details on the specifications for this individual product, please refer to the datasheet.