SICK WS/WE100-2P1239S01 Photoelectric sensors. SICK WS/WE100-2P1239S01 is a photoelectric sensors in the W100-2 family. SICK identifies this exact configuration as manufacturer article 6052401. The official technical record specifies Functional principle: Through-beam photoelectric sensor; Dimensions (W x H x D): 11 mm x 31 mm x 20 mm; Housing design (light emission): Rectangular; Sensing range max.: 0 m ... 33 m; Sensing range: 0 m ... 20 m; Type of light: Visible red light. The linked SICK data sheet is specific to WS/WE100-2P1239S01.