Omron E3S-AT66L Photoelectric Switch Emitter

Omron E3S-AT66L Photoelectric Switch Emitter is the light-emitting half of an Omron E3S photoelectric sensor pair, designed to operate from 10 to 30 V DC and to connect via a 4-pin interface. It is used in automation and sensing systems to provide the optical beam that a corresponding receiver detects for object presence or absence along a defined sensing path. The E3S-AT66L designation identifies this emitter variant, typically paired with the E3S-AT66D receiver in the same family. Key electrical characteristics are a 10–30 V DC supply and a 4-pin connector, with installation requiring correct wiring polarity. This emitter supports integration into production lines, packaging machinery, and material handling setups where reliable non-contact detection is needed through a photoelectric setup, delivering consistent optical output when used with the matching receiver.