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An instrument bubble tagged as a level controller.
Also known as: LIC instrument symbol, Level controller symbol
On a piping and instrumentation diagram a bubble tagged LIC denotes a level indicating controller, holding the liquid level in a vessel at a set point.
Denotes a controller holding a vessel's liquid level at a set point.
Contexts: Technical drawing
Commonly acts on the outlet rather than the inlet, so the signal line's destination tells a reader how the level is actually being held.
Contexts: Technical drawing
An instrument circle containing the letters L, I and C above a loop number, with a signal line leaving it.