Instrumentation Instrumentation Questions Level Measurement

How a Level troll works? Name the parts of a pneumatic Level troll.

Level troll-Level measuring instrument

A Level troll in and instrument used for measuring the liquid level between two known points. The Level troll works on the buoyancy principal. Leveltrol has a float, which submerses proportionately with liquid level raise in the float chamber. The amount of submersion of the dis placer depends on the liquid density, which produces a torque. The amount of torque produced in measured in terms of % of level.
Parts of Level troll:

Float chamber, Float, Torque lever, Knife edge, Feedback Bellows, Air Relay, Restriction, Flapper, Nozzle, Feedback link, Density range, Action change lever, HP and LP flange,

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