Magnetic level indicator device for a not compact solid product in a container

Magnetic level device for signalling a preset level of a not compact solid product housed in a container for such product in an operative condition of the device. Said device (1) comprises a crankshaft means (3) placed inside the container (4) and whose main journal (5) has a horizontal rotation axis fixed with respect to the container (4) and it (5) is rotated around such axis by rotation means (6) at least in such operative condition. The eccentric crankpin (7) of the crankshaft means (3) has the respective horizontal rotation axis parallel to the rotation axis of the main journal (5) and it (7) supports, in a freely rotatable manner, a big end (9) of a connecting rod means (10) which small end (12) bears a magnetic means (14). Said device 81)further comprises a magnetic detector means (15) fixed at least in proximity to the container (4), having a volume (V) of sensitivity range extending inside the container (4) at least of predetermined radius (S) lower than a predetermined maximum value and placed on a geometric plane perpendicular to the rotation axes of the crankshaft means (3) and passing through the central portion of the magnetic means (14). The length (B) of the connecting rod means (10) or rather the distance between the big end (9) and the magnetic means (14) is equal to or greater than the difference between the distance (D) that separates the main journal (5) from said volume (V) of the sensitivity range of the magnetic detector means (15) in the container and the distance (R) between said main journal (5) and the eccentric crankpin (7). In the level checking condition, the presence in the container (4) of material above the predetermined level prevents the approaching and/or the abutment of the magnetic means (14) with the sensitivity range volume of the magnetic detector means (15); if the level is below, the magnetic means (14) can match with or enter into the sensitivity range volume of the magnetic detector means (15), which consequently emits a signal of reaching of said predetermined level.