What this part is
Omron E2E-X8MD2-M1G is an M12 unshielded inductive proximity sensor from the E2E standard DC 2-wire series. It detects ferrous targets at 8 mm through a nickel-plated brass barrel, outputs a NC signal via a 2-wire DC system, and connects via an M12 4-pin connector.
What the ratings mean for fit
Unshielded construction gives the full 8 mm sensing distance; a shielded variant of the same size would drop to roughly 4 mm. The 2-wire DC output simplifies wiring — only two wires for power and signal — but carries a voltage drop across the sensor; verify your load can tolerate it at the low end of the 12-24 VDC supply. NC output means the sensor opens on detection, making it a natural fit for fail-safe circuits or where a normally-closed loop is expected. The M12 4-pin connector ensures a quick disconnect; pinout follows standard DC proximity wiring. Mounting options: either a bracket with a 12 mm mounting hole or directly into an M12×1 threaded hole. Overall length is 48 mm, threaded section 26 mm — compact enough for tight spaces.