SICK GTB10-N1211 Photoelectric sensors. SICK GTB10-N1211 is a photoelectric sensors in the G10 family. SICK identifies this exact configuration as manufacturer article 1065858. The official technical record specifies Functional principle: Photoelectric proximity sensor; Functional principle detail: Background suppression; Dimensions (W x H x D): 20 mm x 50 mm x 39 mm; Housing design (light emission): Rectangular; Sensing range max.: 20 mm ... 950 mm 1); Type of light: Visible red light. The linked SICK data sheet is specific to GTB10-N1211.