SICK GTE6-N1201S56 Photoelectric sensors. SICK GTE6-N1201S56 is a photoelectric sensors in the G6 family. SICK identifies this exact configuration as manufacturer article 1075054. The official technical record specifies Functional principle: Photoelectric proximity sensor; Functional principle detail: Energetic; Sensing range max.: 5 mm ... 110 mm 1); Sensing range: 20 mm ... 45 mm 2); Light source: PinPoint LED 3); Type of light: Visible red light. The linked SICK data sheet is specific to GTE6-N1201S56.