The Siemens 3RG7201-2CC03 is a SIMATIC PXO620 K80 retro reflective photoelectric sensor with a built-in polarisation filter. It runs on 10-36 VDC, outputs PNP antivalent at 200 mA, and has a sensing range of 6 meters. The M18 4-pole connector makes it a quick swap in existing mounts, and IP67 keeps it running in washdown or dusty areas.
The 6 m range is the rated sensing distance to a standard reflector — enough for conveyor lanes or pallet detection in a 5-6 m aisle. PNP antivalent means two outputs: one normally open, one normally closed, so you can wire fail-safe logic without an extra relay. The 200 mA load capacity per output handles most PLC inputs and small contactors directly. No standard layout on the connector means the pin assignment is not the typical Siemens 4-pin pattern — verify the wiring diagram before terminating.
The polarisation filter rejects reflections from shiny targets — useful on wrapped pallets or glossy packaging where a standard retro sensor would false-trigger. IP67 means it survives hose-down cleaning, but check the connector is fully seated and the cable gland is tightened; that's where water usually gets in.