4 mm sensing distance — what it means on the line
The E2A-M12KS04-M3-B1: The E2A-M12KS04-M3-: The E2A-M12KS04-M3- is an Omron M12 shielded inductive proximity sensor with a 4 mm flush sensing distance. That 4 mm is the rated detection on mild steel — correction factors for stainless or aluminum reduce it, so budget the real working gap accordingly. The M12 barrel threads into a standard 12 mm mounting hole; the shielded construction lets it mount flush in a steel bracket without false triggering from the surrounding metal.