Innovative system for monitoring the fluid level inside atmospheric tanks. This system detects the static pressure generated by the fluid height by means of a tube and professional displays the fluid level up to 4 m., the volume or filling percentage. The control unit is provided with an intuitive and complete professional software that allows to set 2 alarm levels (SPDT) and/or activate remote alarm devices. High accuracy (+/- 1%). Very easy installation directly on the professional tank or at a distance up to 50 m. far.