What it is — and where it fits
E2Q5N20F3M1OEE is a rectangular inductive proximity sensor from Omron's E2Q5 series, 40×40×67 mm, flush mount, with a 20 mm sensing distance on a PNP NO/NC output. Switching frequency hits 150 Hz, so it keeps up with moderate line speeds. M12 connector, IP67 sealed — washdown-safe for food or wet environments. Operating voltage 10–30 VDC, load current 200 mA. Polybutylene terephthalate (PBT) housing, rated -25 to 85°C.
Cross-shop: E2Q5N40MF1M1OEE
If you need longer range, the same-series peer E2Q5N40MF1M1OEE shares the identical 40×40×67 mm rectangular housing, M12 connector, and IP67 rating — but it offers 40 mm sensing distance versus 20 mm. Trade-off: that part is PNP NO only (not NO/NC configurable) and its operating voltage max is listed at 10 V, which limits compatibility. Physically it drops into the same mount; electrically verify the output type and voltage tolerance before swapping.