SICK GSE2S-P1321S01 Photoelectric sensors. SICK GSE2S-P1321S01 is a photoelectric sensors in the G2 family. SICK identifies this exact configuration as manufacturer article 1089630. The official technical record specifies Functional principle: Through-beam photoelectric sensor; Dimensions (W x H x D): 7.7 mm x 21.8 mm x 13.5 mm; Housing design (light emission): Rectangular; Sensing range max.: 0 m ... 3 m; Sensing range: 0 m ... 2 m; Type of light: Infrared light. The linked SICK data sheet is specific to GSE2S-P1321S01.