The operating principle of these instruments is based on the magnetic drive of one or more reed contacts, placed inside the measuring rod, by one or more floats. The only moving element is the float that moves, by hydrostatic thrust, along the measuring rod; this guarantees an extreme robustness and a limited need for maintenance. Up to 6 check points. Threaded or flanged connections. Brass Rod and Body, Spansil Floats. On request ASI versions (Multipoint S version), ATEX, integrated temperature sensors.