The float, suspended to a cable supported with 2 pulleys, drives a counterweight in the external transparent tube, showing level of liquid inside the tank.
The balance weight has a built in magnet to actuate the level switches.

SFA level indicator includes a float and a balance weight linked together by cable running on 2 pulleys.
The counterweight is guided inside a transparent PVC tube (Ø 63 x 57) that allows an easy level reading.
The guiding tube is fixed with PE collars; it is equipped in option with PVC graduated ruler and / or level switches.