The Siemens 3RG7641-0AB00 is a SIMATIC PXO220 M18S polarized retro-reflective photoelectric sensor in a straight M18×52 barrel. It operates on 10-30V DC, outputs PNP light-on at 150mA, and detects up to 3m with a 2m PUR cable (3×0.34mm²). Rated IP67, it handles washdown and dusty environments without a separate enclosure.
The 10-30V DC supply is standard for industrial 24V panels; the 150mA output drives PLC inputs or small relays directly. Polarized optics reject false triggers from shiny targets — critical on conveyors with reflective packaging. The 3m sensing range suits medium-distance retro-reflective setups; the 2m PUR cable is oil-resistant and flexible for cable-track routing.