Displacer operated Level Switch offer control features not found in float operated controls. The basic sensing means utilizes displacer heavier than the liquid which is suspended from a spring. When the liquid contacts the displacer, a buoyancy force is produced, which causes the effective weight of the displacer to change, in turn causing the spring to seek a new balance position which moves the attraction sleeve into the field of the magnet. This principle provides for wide switching differential and allows the desired level switching point to be adjusted by moving the displacers up or down the suspension cable. Further advantage allows for adoption to high pressure applications since displacers have substantial heavier wall thickness than floats and in many cases are made out of solid materials.