A device for filling liquids, in particular carbonated beverages into bottles (1), cans or similar containers, said device having at least one filling tank (2) and filler elements (3) connected thereto, and having at least one measuring device (4) for the quantitative and/or qualitative analysis of the liquid, wherein the measuring device (4) is positioned in a return line (5) for the guiding of the liquid in a circulating manner through the filler tank (2), wherein the measuring device (4) is in the form of a concentration and/or temperature and/or density and/or conductivity measuring device or the like.