What this sensor is
The E2E-X1R5C18-M1: Shielded M8 cylindrical proximity sensor with a 2 mm flush-mount sensing range. NPN normally-open output switches up to 200 mA on a 10-30 VDC supply. M12 quick-connector makes it a fast swap in a panel if the existing sensor is NPN with the same pinout. Stainless steel 303 body earns IP67 and IP69K ratings, so it lives in washdown zones without complaint.
