The Omron E3JM-10M4-GE3JM-10M4-G-N is a built-in power supply photoelectric sensor — a self-contained unit that doesn't need a separate amplifier or controller. It's designed for through-beam detection of opaque objects, with a minimum detectable object size of 14.8 mm diameter. That's the key fit parameter: if your application needs to catch a part or a passing object smaller than that, this sensor won't see it reliably.
Construction and Environment
The housing is ABS, the lens is methacrylic resin, and the cover is polycarbonate. The mounting bracket is iron. That's a mix that handles typical industrial washdown and vibration, but the ABS case isn't rated for high-temperature or aggressive chemical environments — keep it out of direct solvent spray. The iron bracket gives solid mechanical support but will rust if the coating gets scratched in a wet area.