What this Omron light curtain guards
The Omron F3SG-4RR0240-14 is a safety light curtain — SENSOR LIGHT CURTAIN per the listing — used to create a protective detection zone around a hazard, typically a press, robot cell, or automated assembly station. The 14 mm resolution in the order code means the curtain detects fingers reaching into the guarded area, meeting the finger-protection class under IEC 61496-1.