SICK WSE4S-3F2130V Photoelectric sensors. SICK WSE4S-3F2130V is a photoelectric sensors in the W4 family. SICK identifies this exact configuration as manufacturer article 1052891. The official technical record specifies Functional principle: Through-beam photoelectric sensor; Sensing range max.: 0 m ... 5 m; Sensing range: 0 m ... 4.5 m; Light source: PinPoint LED 1); Type of light: Visible red light; Light spot size (distance): Ø 50 mm (2 m). The linked SICK data sheet is specific to WSE4S-3F2130V.