The Siemens 3RG7201-3HC42 is a SIMATIC PXO620 K80 retro reflective photoelectric sensor with an integrated polarisation filter, sized at 83x61x25 mm. It operates on DC 10-36 V and delivers a 6 m sensing range via an NPN antivalent output rated at 200 mA, terminated in a 4-pole M12 connector with IP67 ingress protection.
Mounts in a standard 83x61x25 mm footprint. The M12 4-pin connector mates with standard sensor cables; the antivalent output provides both normally-open and normally-closed signals on separate wires, simplifying PLC input wiring for fail-safe detection. The polarisation filter rejects reflections from shiny targets, making it suitable for clear or glossy object detection.