Omron XS2G-A421 Photoelectric Sensor Through-Beam is a through-beam photoelectric sensor from Omron, model XS2G-A421. It detects objects by the interruption of a light beam between an emitter and a receiver, producing an output when the beam is interrupted. This arrangement is commonly used in automation and manufacturing environments for non-contact presence/absence detection on conveyors, packaging lines, and other equipment where reliable sensing is required.
