The Siemens 3RG7210-5WS00 is a SIMATIC PXO610 K80 diffuse sensor from the energetic series, built for AS-I networks. It measures 83x61x25 mm, comes with a 2-meter AS-I cable, and uses FK-clamp terminals. The sensor is programmable for light-on or dark-on operation and includes an onboard timer adjustable from 0.01 to 1 second. Its IP67 rating means it handles washdown and dusty environments without an extra enclosure.
Mounting is straightforward for a panel-builder: the 83x61x25 mm footprint fits standard 30 mm bracket mounts common to M30 tubular sensors, though this is a rectangular block. The FK-clamp terminals accept 0.2–2.5 mm² wire, and the 2-meter AS-I cable can be cut to length or routed through a gland. The onboard timer (0.01–1 s) is set via a potentiometer or DIP — useful for debouncing or delaying the output on a conveyor photo-eye. IP67 means no derating for dust or hose-down; just keep the cable entry sealed.