Nuclear (gamma) level transmitter

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

Drawn as

A source holder (small box) on one side of the vessel and a detector rod on the other, joined by a wavy (radiation) line across the vessel, with an LT bubble on the detector.

Meaning

Gamma level or density measurement through the vessel wall: slug catchers, desanders, profilers in separators. Needs radiation controls. No dedicated component.

Variants

The source holder may be marked with the radiation trefoil or "RS"
Density profilers have many detectors in a vertical row