The operation of the COMECO’s level probe for liquids LCSFS is based on the switching of a reed switch by a magnetic float, rotating around a fixed point or sliding along a stem. This switch is designed for external or internal mounting on the side vessel walls and is electrically terminated by lead wires. Large variety of versions based on different body and float materials is available for use at operating temperature up to 120 °C, process pressure up to 5 bar, and specific gravity of the liquid down to 0.6 g/cm3.