The invention relates to a system (1) for distributing solid particles in order to load an enclosure with solid particles, including: a device (30) for supporting a device (10) for loading solid particles, said supporting device being arranged such as to maintain the loading device in the enclosure, and a sensor-supporting device (40), said sensor (46) intended for collecting information on the loading of the enclosure, and in which the system for distributing solid particles is arranged such that the supporting device and the sensor-supporting device can be mounted on the device for loading solid particles, while being movable relative to said loading device.