SICK WL9-3N1102S07 Photoelectric sensors. SICK WL9-3N1102S07 is a photoelectric sensors in the W9 family. SICK identifies this exact configuration as manufacturer article 1076074. The official technical record specifies Functional principle: Photoelectric retro-reflective sensor; Functional principle detail: Without reflector minimum distance (autocollimation/coaxial optics); Dimensions (W x H x D): 12.2 mm x 50 mm x 23.6 mm; Housing design (light emission): Rectangular; Mounting hole: M3; Sensing range max.: 0 mm ... 290 mm 1). The linked SICK data sheet is specific to WL9-3N1102S07.