SICK GTB2F-P1131 Photoelectric sensors. SICK GTB2F-P1131 is a photoelectric sensors in the G2 family. SICK identifies this exact configuration as manufacturer article 1093722. The official technical record specifies Functional principle: Photoelectric proximity sensor; Functional principle detail: Background suppression; Dimensions (W x H x D): 14 mm x 24 mm x 3.5 mm; Housing design (light emission): Rectangular; Minimum detectable object (MDO): 0.1 mm 1); Sensing range max.: 1 mm ... 35 mm. The linked SICK data sheet is specific to GTB2F-P1131.