A density comparator is a device used to measure and compare the density of
liquids. It typically consists of a glass tube with a precisely calibrated
scale and a reference weight. The user fills the tube with the liquid to be
measured and adjusts its temperature to a standard value. The device then
allows for a visual comparison of the liquid's density against the reference
weight, helping to determine the accuracy of the liquid's density or specific
gravity. Density comparators find applications in industries such as chemical
manufacturing, quality control, and research laboratories for ensuring precise
measurements of fluid densities.