A dosing device for feeding an infusion product for making filter bags, comprising: - a tower for containing loose infusion product; - a plurality of tubular channels for feeding the product in communication with the containment tower and protruding from it; each channel of said plurality of channels being actuated by a corresponding actuation device configured for actuating said channel for releasing a predetermined quantity of product from a relative free end; - a first plurality of receiving containers individually associated with the plurality of tubular channels; each container being equipped with a wall which is movable between a closed position for retaining the product inside the container and an open position for allowing the escape by falling of the quantity of infusion product from the container; - a fixed platform supporting the first plurality of containers; - a plurality of elements for real weighing of the product, each of which being supported by the fixed platform and associated with a respective receiving container of the first plurality of containers; each element for real weighing of the product being configured for measuring the value of the weight of the container to which it is associated and the quantity of product inside it; - a control unit in communication with each actuation device and with each real weighing element, in such a way as to detect the value measured by each element of the plurality of elements and actuate the corresponding channel until reaching said predetermined quantity of product, characterised in that it comprises a plurality of reference elements each positioned close to a corresponding real weighing element and independent of the same real weighing elements; said plurality of reference elements being associated with the fixed platform each supporting a weight of predetermined value; each said reference element of said plurality of reference elements being in communication with the control unit in such a way as to transmit a signal equivalent to the measured value of said reference weight by the reference element and wherein the control unit is programmed to receive and process each signal corresponding to the real weight of the dose sent by each real weighing element with the signal relative to the reference weight of the known value sent by the corresponding reference element; said control unit being able to modify the operating configuration for releasing the infusion product of the corresponding tubular conduit in the presence of a data, outside of preset parameters, obtained from the difference between the weight measured by each real weighing element and the weight measured by the corresponding reference element. - a tower for containing loose infusion product; - a plurality of tubular channels for feeding the product in communication with the containment tower and protruding from it; each channel of said plurality of channels being actuated by a corresponding actuation device configured for actuating said channel for releasing a predetermined quantity of product from a relative free end; - a first plurality of receiving containers individually associated with the plurality of tubular channels; each container being equipped with a wall which is movable between a closed position for retaining the product inside the container and an open position for allowing the escape by falling of the quantity of infusion product from the container; - a fixed platform supporting the first plurality of containers; - a plurality of elements for real weighing of the product, each of which being supported by the fixed platform and associated with a respective receiving container of the first plurality of containers; each element for real weighing of the product being configured for measuring the value of the weight of the container to which it is associated and the quantity of product inside it; - a control unit in communication with each actuation device and with each real weighing element, in such a way as to detect the value measured by each element of the plurality of elements and actuate the corresponding channel until reaching said predetermined quantity of product,