M18 barrel, 8 mm detection window
The E2A-S08KN04-M3-B1: The E2A-S08KN04-M3-: The Omron E2A-S08KN04-M3- is an inductive proximity sensor in an M18 threaded barrel, sensing at 8 mm on mild steel. That 8 mm range is the standard sensing distance for a shielded M18 inductive sensor — it catches a target before the barrel face contacts it, which matters when you're positioning stops or detecting part presence on a conveyor.
Panel fit and wiring check
The M18 barrel threads into a standard 18 mm mounting hole or bracket — common on conveyor frames, machine guards, and fixture plates. The M3 connector (M12-style, 3-pin) mates with standard cordsets; verify the output configuration (PNP or NPN) from the full part number suffix before wiring into the PLC input card.