The Omron E2E-X2D1-M3G is a shielded inductive proximity switch with a 2 mm sensing distance, terminated to an M8 4-pin connector per IEC arrangement. Its output is DC 2-wire, normally open. Polarity matters on this type — reverse connection will destroy the sensor. It is rated for current production, so no last-time-buy clock is running.
The shielded construction allows flush mounting in metal, eliminating the need for a non-ferrous standoff zone. Verify the M8 connector pinout matches the cable assembly on hand; the 4-pin IEC arrangement is standard but not universal.