SICK VTB18-4P1240VS01 Photoelectric proximity sensor. SICK VTB18-4P1240VS01 is a archive in the V18 family. SICK identifies this exact configuration as manufacturer article 6037754. The official technical record specifies Functional principle: Photoelectric proximity sensor; Functional principle detail: Background suppression; Dimensions (W x H x D): 18 mm x 18 mm x 83 mm; Housing design (light emission): Cylindrical; Housing length: 83 mm; Thread diameter (housing): M18 x 1. The linked SICK data sheet is specific to VTB18-4P1240VS01.