SICK GTE10-R3821 Photoelectric sensors. SICK GTE10-R3821 is a photoelectric sensors in the G10 family. SICK identifies this exact configuration as manufacturer article 1065874. The official technical record specifies Functional principle: Photoelectric proximity sensor; Functional principle detail: Energetic; Dimensions (W x H x D): 20 mm x 50 mm x 51.5 mm; Housing design (light emission): Rectangular; Sensing range max.: 20 mm ... 2,000 mm 1); Sensing range: 40 mm ... 1,400 mm 1). The linked SICK data sheet is specific to GTE10-R3821.