Field note: unshielded M12 for non-flush mounting
The Omron E2B-M12KN05-WP-B1 5M is an unshielded cylindrical proximity switch in a 12 mm brass housing with a 5 m PVC cable, 5 mm sensing distance, and a PNP normally-open output. The unshielded design means the sensing field projects from the face only, so the switch cannot be flush-mounted in metal — plan for a non-metallic target zone or a standoff gap. Short barrel keeps the footprint minimal; pre-wired PVC cable is rated for 5 m continuous pull and suits industrial washdown environments (IP67 implied by the series).
How it compares: shielded 18 mm sibling
The closest functional sibling is E2B-M18KS05-WP-B1 5M, a shielded 18 mm diameter part with the same 5 mm sensing distance and PNP/NO output. The key decision driver: the shielded 18 mm can be flush-mounted in metal without reducing the sensing range, while the 12 mm unshielded version cannot. They are not drop-in interchangeable — the hole diameter (12 mm vs 18 mm) and shielding rule out swapping without panel rework.
Mounting and wiring check
12 mm diameter short barrel. PVC cable exits straight; 5 m length suits panel entry. PNP output.