Separation device comprising a separation channel and a counter-channel

A device (1) for separating solutions containing suspended substances in a liquid carrier comprising a casing (100) comprising a cavity (110) defining a substantially cylindrical internal wall (120) with a predetermined height, and at least an actual first separation channel (200) with an annular substantially cylindrical shape with a substantially rectangular cross-section, formed by the combination of three mounting components:

• a first mounting component (10), a wall portion of which defines at least a first side wall of said-separation channel, a second mounting component (20) including at least a recess (22) defining a second side wall of said separation channel (200) and the dimension of said separation channel (200), and a third mounting component (30) being positioned against the second component, defining a third side wall and completing said separation channel (200), said device comprising at least a second channel called counter-channel (300), positioned facing the first separation channel (200), between the first mounting component (10) and said internal wall (120) of the cavity (110) of the casing (100).