Side Mounted Magnetic 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 inside the switch housing which in turn operates an SPDT MICROSWITCH. Microswitch contacts can be utilized for initiating audio-visual signals or pump control. Other Related Products: TOP MOUNTED MAGNETIC LEVEL SWITCH CABLE FLOAT SWITCH