SICK WL4SLG-3P5254H Photoelectric sensors. SICK WL4SLG-3P5254H is a photoelectric sensors in the W4 family. SICK identifies this exact configuration as manufacturer article 1109333. The official technical record specifies Functional principle: Photoelectric retro-reflective sensor; Functional principle detail: Without reflector minimum distance (autocollimation/coaxial optics); Sensing range max.: 0 m ... 3.5 m 1); Sensing range: 0 m ... 2.2 m 1); Polarisation filter: Yes; Light source: Laser 2). The linked SICK data sheet is specific to WL4SLG-3P5254H.