The Siemens SIRIUS 3UG3207-1C is a single-pole bow electrode probe used for level monitoring in conductive liquids. Its mechanically stable design suits lateral installation in tanks, sumps, or vessels where a rugged sensing element is needed.
The 3UG3207-1C is a probe — not a complete level controller. It connects to a compatible SIRIUS evaluation unit (like the 3UG32 series relay) that supplies the sensing voltage and interprets the conductivity path. The bow electrode shape gives a larger surface area than a rod, improving contact with foaming or low-conductivity media. Lateral installation means it mounts through a sidewall port, not top-down, which matters when headroom is tight or the vessel is sealed.
Substance prohibitance date of 05/01/2012 aligns with RoHS and REACH compliance timelines. The reference code according to IEC 81346-2 is K, which designates it as a sensing or monitoring device in the panel schematic.