SICK WF2-40B41CA71 Fork sensor. SICK WF2-40B41CA71 is a fork sensor in the WF family. SICK identifies this exact configuration as manufacturer article 6058616. The official technical record specifies Functional principle: Optical detection principle; Dimensions (W x H x D): 10 mm x 32 mm x 57 mm; Fork width: 2 mm; Fork depth: 42 mm; Light source: LED, Infrared light; Label detection: ✔. The linked SICK data sheet is specific to WF2-40B41CA71.