The E3A2R3M4DGN: The Omron E3A2-R3M4D-GN is a retroreflective photoelectric sensor that uses a pulse-modulated red LED, polarized, to detect objects up to 3 m from the reflector. The IP66 rating means the housing and optics hold up against washdown and high-pressure spray — suitable for food-processing lines, cold storage, or outdoor conveyor transfer points where moisture and debris are routine.
The control output is a SPDT relay rated 3 A at 250 V AC (p.f. = 1) and 3 A at 30 V DC, giving you a dry-contact signal that interfaces directly with a PLC input, contactor coil, or alarm annunciator without an interposing relay. A built-in timer function adjustable from 0.1 to 5 seconds lets you delay the output on or off — useful for ignoring momentary interruptions like a passing fork tine or a cleaning spray burst.