Guided wave radar level transmitter

ISA 5.1-2009/2022 (primary element symbols) / PIP PIC001

Drawn as

An LT bubble on a vessel-top (or chamber-top) nozzle, with a straight rod or cable probe running down into the liquid.

Meaning

Guided wave radar: a pulse travels down the probe and reflects at the surface or interface. Separators, drums and bridles. Becomes guided-wave-radar.

Variants

Often mounted in an external chamber (bridle), drawn like a displacer cage with a probe
Some legends mark it "GWR" beside the bubble