SICK WTB4SL-3P2264VS02 Photoelectric sensors. SICK WTB4SL-3P2264VS02 is a photoelectric sensors in the W4 family. SICK identifies this exact configuration as manufacturer article 1095525. The official technical record specifies Functional principle: Photoelectric proximity sensor; Functional principle detail: Background suppression; Sensing range max.: 40 mm ... 200 mm 1); Sensing range: 40 mm ... 200 mm 1); Light source: Laser 2); Type of light: Visible red light. The linked SICK data sheet is specific to WTB4SL-3P2264VS02.