SICK ZLD18-5PT3A8 Photoelectric sensors. SICK ZLD18-5PT3A8 is a photoelectric sensors in the Z18 Simple Sense family. SICK identifies this exact configuration as manufacturer article 1089835. 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): 24 mm x 42.6 mm x 33.3 mm; Housing design (light emission): Hybrid; Mounting system type: 24 mm, ball/M18, base; Housing color: Blue. The linked SICK data sheet is specific to ZLD18-5PT3A8.