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The GranuCharge measures automatically and precisely the quantity of electrostatic charges created inside a powder during a flow in contact with a selected material. 

The powder sample flows inside a vibrating V-tube and falls in a uniquely designed Faraday cup connected to an electrometer. 

The electrometer measures the charge acquired by the powder during the flow inside the V-tube. To obtain reproducible results, a rotating or a vibrating device is used to feed the V-tube regularly.