Based on this product's specifications, here are some alternatives and similar models
Photoelectric sensor Datalogic BASIC M18, grey housing, brass body, 1 kHz, 0.2 A, length 73.4 mm
Summary description:
Datalogic BASIC M18 photoelectric sensor with grey finish and brass housing. Operates at 1 kHz frequency with a maximum current of 0.2 A. Compact optical sensor 73.4 mm deep and weighing 95 g, suitable for object detection and presence sensing in industrial automation, conveyor systems, and machine safety applications.