SICK WSE9M4-3P2230 Photoelectric sensors. SICK WSE9M4-3P2230 is a photoelectric sensors in the W9 family. SICK identifies this exact configuration as manufacturer article 1051912. The official technical record specifies Functional principle: Through-beam photoelectric sensor; Dimensions (W x H x D): 12.2 mm x 49.8 mm x 23.6 mm; Housing design (light emission): Rectangular; Mounting hole: M4; Sensing range max.: 0 m ... 10 m; Sensing range: 0 m ... 7 m. The linked SICK data sheet is specific to WSE9M4-3P2230.