SICK WF225-B4150 Fork sensors. SICK WF225-B4150 is a fork sensors in the WF family. SICK identifies this exact configuration as manufacturer article 6022139. The official technical record specifies Functional principle: Optical detection principle; Dimensions (W x H x D): 12 mm x 262.5 mm x 80 mm; Fork width: 225 mm; Fork depth: 60 mm; Light source: LED, Infrared light; Output function: Light/darkswitching, adjustable via reverse polarity. The linked SICK data sheet is specific to WF225-B4150.