A device is provided for measuring metal inclusions comprising a
receptacle for holding a sample of molten metal, with this receptacle
having insulated side walls and a bottom wall provided with an exit
opening. A ceramic filter element for collecting inclusions from the
molten metal is positioned within the exit opening and is bonded to the
top face of a solid refractory or metal annular support ring with a
portion of the support ring top face extending laterally beyond the
filter element and engaging the bottom face of the bottom wall of the
receptacle around the opening. The filter element and support ring
assembly is held in place by a detachable retaining means which is
adapted to securely hold the support ring in leak-tight engagement
against the receptacle bottom wall with the filter element positioned in
the exit opening.