SICK GL10-P4151 Photoelectric sensors. SICK GL10-P4151 is a photoelectric sensors in the G10 family. SICK identifies this exact configuration as manufacturer article 1069860. The official technical record specifies Functional principle: Photoelectric retro-reflective sensor; Functional principle detail: With minimum distance to reflector (dual lens system); Dimensions (W x H x D): 20 mm x 50 mm x 39 mm; Housing design (light emission): Rectangular; Sensing range max.: 0.15 m ... 12 m 1) 0.15 m ... 10 m 2); Sensing range: 0.3 m ... 9.5 m 1) 0.3 m ... 8 m 2). The linked SICK data sheet is specific to GL10-P4151.