SICK GTB6-F7441S65 Photoelectric sensors. SICK GTB6-F7441S65 is a photoelectric sensors in the G6 family. SICK identifies this exact configuration as manufacturer article 1086343. The official technical record specifies Functional principle: Photoelectric proximity sensor; Functional principle detail: Background suppression; Sensing range max.: 0 mm ... 500 mm 1); Sensing range: 0 mm ... 400 mm; Light source: LED 2); Type of light: Infrared light. The linked SICK data sheet is specific to GTB6-F7441S65.