This type of level switch uses displacer that do not float on the surface of liquids but suspended on a coil Displacers are not affected by turbulence or pressure and are
excellent for applications with viscous or dirty liquids. Applications include
foaming liquids, heavy oil refineries, paints & varnishes, and chemical
Working Principle: Working principle of the level switch is based on a buoyancy principle. This level switch is consists of Switch Assembly, Wire Rope with Spring Assembly and Displacer suspended on spring. Displacer having more density than the process liquid is used. Spring selection is determined by the weight of the displacer. When level rises it displacer is submerged and amount of weight equal to the weight of process liquid is displaced. This displacement relives spring tension causes the actuation of micro switch.