Shreddersort: Control of a metal separation plant using LIBS spectroscopy for the recycling industry. The challenge: On a conveyor belt at 2m / s, it is intended to develop a system that controls a metallic waste separation line by detection and blowing, and that synchronizes: (1) detection by inductive sensors of the position of each fragment, (2) the firing of a pulsed laser; (2) the acquisition of the optical emission spectrum of the plasma generated by the pulses; and (3) the activation of the blow valves.