WL8-P1131 Sick photoelectric retro-reflective sensor

The WL8-P1131 is a miniature photoelectric retro-reflective sensor manufactured by SICK AG. The datasheet provides key specifications, including its compact dimensions and reliable detection features. 
Key specifications and features:Functional Principle: Photoelectric retro-reflective sensor.
Dimensions (W x H x D): 11 mm x 31 mm x 20 mm.
Sensing Range Max: 0 m … 4 m (with reflector PL80A).
Light Source: Visible red light LED (wavelength 650 nm).
Output Type: PNP switching output.
Connection Type: M8, 3-pin male connector (or a 2m PVC cable variant).
Enclosure Rating: IP67.
Adjustment: Potentiometer.
Special Feature: Includes a polarization filter to ensure reliable detection even on reflective backgrounds.