SICK WLG4SP-22162130A00 Photoelectric sensors. SICK WLG4SP-22162130A00 is a photoelectric sensors in the W4 family. SICK identifies this exact configuration as manufacturer article 1136637. The official technical record specifies Functional principle: Photoelectric retro-reflective sensor; Functional principle detail: Without reflector minimum distance (autocollimation/coaxial optics), ClearSens, MultiMode; MultiMode: Modes can only be configured via IO link; Sensing range min.: 0 m; Sensing range max.: 7.1 m; Maximum distance range from reflector to sensor (operating reserve 1): 0 m ... 7.1 m. The linked SICK data sheet is specific to WLG4SP-22162130A00.