#chemistry apparatus
- Areometric — Belonging or relating to an hydrometer (areometru), or based on measurements carried out using this hydrostatic instrument utilized to determine the relative density of liquids or the concentration of solutions. In a structural technical sense, it describes a method, a graduated scale, or an experimental procedure based on Archimedes' principle, used in laboratories for analyzing industrial fluids, dairy products, or alcoholic beverages.
- Areopycnometer — A hybrid laboratory instrument used for the high-precision measurement of liquid density or the specific gravity of chemical solutions. This device structurally combines the hydrostatic operational principle of the hydrometer (based on the volume of displaced liquid) with the rigid volumetric technique of the pycnometer, ensuring superior calibration and accuracy by partially eliminating errors caused by ambient temperature variations.