SICK WSE4FP-6G312100ZZZ Photoelectric sensors. SICK WSE4FP-6G312100ZZZ is a photoelectric sensors in the W4 family. SICK identifies this exact configuration as manufacturer article 1123899. The official technical record specifies Functional principle: Through-beam photoelectric sensor; Sensing range min.: 0 m; Sensing range max.: 10 m; Maximum distance range from receiver to sender (operating reserve 1): 0 m ... 10 m; Recommended distance range from receiver to sender (operating reserve 2): 0 m ... 7.5 m; Recommended sensing range for the best performance: 0 m ... 7.5 m. The linked SICK data sheet is specific to WSE4FP-6G312100ZZZ.