The F3SG-4RE0990P30 is a safety light curtain photoelectric switch manufactured by Omron. It is an installation type safety photoelectric switch, compliant with the EN ISO 14119/EN 61496-1 standards. It is designed for applications requiring reliable protection against person, machine, and property injury or damage. Its features include a segmented shielding function between each of the beams, a multiplex function that allows two adjacent safety light curtains to be connected together, reliable safety functions, and easy installation and wiring. The F3SG-4RE0990P30 is suitable for use in medium-sensitive applications and is available in both a standard and high-precision model.