The KOBOLD level switch model NV Is a reasonably-priced compact Instrument for checking levels. A stainless steel round and hollow float appended to one end of a balanced arm moves with the fluid level. The movement of the float is exchanged to a lasting magnet fitted at the flip side of the balanced arm. These instruments are conveyed in standard sleeves for side installation and PTFE tape is utilized to seal the switch. The permanent magnet switches a reed contact that is fitted in a sliding tube outside the medium. The tube is set as a N/O contact at the manufacturing plant, the contact closes when the level ascents. The exchanging capacity is switched by moving the tube.