The oscillating U-tube densitometer method is a technique to determine the density of liquids and gases based on an electronic measurement of the frequency of oscillation, from which the density value is calculated.Density meters work by measuring the oscillation of a glass tube containing the sample.Specific gravity and refraction index can be measured. They are used in many industries such as: oil, chemical, food and beverage industries for quality control and research and development.
ρ= A∙τ² - B
