Answer / vivekg17s

This displacer LT work onArchimedes' principle that indicates that the upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces. Archimedes' principle is a law of physics fundamental to fluid mechanics.
So change in weight of displacer will be directly proportional to level of lequid and that signal will be sent to LVDT which will be converted to 4 to 20 ma

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