Based on this product's specifications, here are some alternatives and similar models
Panasonic Einweg-Lichtschranke EX11EBPN — single-beam photoelectric sensor, range 0.15 m
Summary description:
Panasonic Einweg-Lichtschranke EX11EBPN is a single-beam photoelectric sensor (one-way/light barrier) with a nominal detection range of 0.15 m. Designed for object detection and presence monitoring in compact automation and safety applications, it provides a compact sensing solution where short-range interruption detection is required. Typical uses include position sensing, part counting, and small conveyor monitoring.