The operation of the level probe LCSF is based on the switching of a reed switch by a magnetic float, moving alongside a protective tube. A large variety of versions based on different floats are available. The float can be made of stainless steel or plastic. Floats with various dimensions and specific gravity are available for use with different liquid density (down to 0.7 g/cm3) and liquid temperature up to 135 °C. Cable wiring is available with various insulations and lengths. The LCSF switch is available in variants designed for inside vessel mounting and in a special submersible variant with additional weight and forced cable insulation.