SICK VS/VE18-4N3212 Through-beam photoelectric sensor. SICK VS/VE18-4N3212 is a archive in the V18 family. SICK identifies this exact configuration as manufacturer article 6013684. The official technical record specifies Functional principle: Through-beam photoelectric sensor; Dimensions (W x H x D): 18 mm x 18 mm x 63.6 mm; Housing design (light emission): Cylindrical; Housing length: 63.6 mm; Thread diameter (housing): M18 x 1; Optical axis: Axial. The linked SICK data sheet is specific to VS/VE18-4N3212.