SICK VSE18L-4P344 Photoelectric sensors. SICK VSE18L-4P344 is a photoelectric sensors in the V18 family. SICK identifies this exact configuration as manufacturer article 6027935. The official technical record specifies Functional principle: Through-beam photoelectric sensor; Dimensions (W x H x D): 18 mm x 18 mm x 107.7 mm; Housing design (light emission): Cylindrical; Housing length: 107.7 mm; Thread diameter (housing): M18 x 1; Optical axis: Radial. The linked SICK data sheet is specific to VSE18L-4P344.