The SICK NANS3-AAAZ30AN1 is a compact through-beam photoelectric sensor designed for reliable object detection in industrial automation applications. It consists of a separate transmitter and receiver pair, where the transmitter projects a focused red light beam to the receiver. Detection occurs when an object interrupts this beam. This design ensures high stability and long sensing distances even in challenging environments. Its miniature size and IP67 protection make it suitable for space-constrained applications such as packaging machinery, material handling, and assembly automation.