The E2Q5N40MF1M1OEE: Rectangular flush-mount inductive sensor in the E2Q5 series. Senses ferrous targets at up to 40 mm through a PBT housing. Output is PNP normally open, switching at 150 Hz. Connector is an M12 inline—makes swapping quick without hardwiring the gland plate.
Compared to E2Q5N20F3M1OEE
The sibling E2Q5N20F3M1OEE shares the same 40×40×67 mm footprint, IP67 rating, and M12 connection, but its sensing distance is 20 mm instead of 40 mm. If your application needs the extra 20 mm of reach, this is the one; if the original spec called for the 20 mm version, this longer-range sensor will still fit mechanically but may detect targets the earlier design ignored.