Magnetic Float SwitchPrinciple of Operation: "Mahalaxmi" make model MLS - 04 / MLS -16magnetic level switches work on the principle of magnetic repulsion and therefore they are glandless and leak proof instruments. A permanent magnet fitted in the tail piece of the float repels another magnet in side the switch housing which in turn operates an SPDT micro switch. Micros witch contacts can be utilized for initiating audio-visual signals or pump control.