Electromechanical level measurement
Sometimes referred to a 'Yo-Yo' device, the Plumbob 3000 is an electromechanical level measuring instrument for continuous measuring of level or volumes in silos, hoppers or tanks.
The Plumbob 3000 is mounted on the top of the silo. A sensor weight is driven down into the silo. It is mounted at the end of a rope or tape which is wound on a motor driven roller. Upon contact with the bulk material, the motor changes the winding direction and the sensor weight is driven back to the upper stop position.
During downwards movement of the sensor weight, the distance is electronically measured by the rotations of the internal rope/tape roller. The microcontroller converts the measured distance into an output signal, which is a volumetric signal based on the silo geometry. The output signal is updated when the sensor weight touches the bulk material.