SICK VTF180-2N42412 Photoelectric sensors. SICK VTF180-2N42412 is a photoelectric sensors in the V180 family. SICK identifies this exact configuration as manufacturer article 6041801. The official technical record specifies Functional principle: Photoelectric proximity sensor; Functional principle detail: Energetic; Dimensions (W x H x D): 18 mm x 18 mm x 69.8 mm; Housing design (light emission): Cylindrical; Housing length: 69.8 mm; Thread diameter (housing): M18 x 1. The linked SICK data sheet is specific to VTF180-2N42412.