U-shape Acoustic Liquid Densitometer

Abstract

The growing interest in measuring density of liquids has led to the need to develop new types of densitometers that can be used in several applications. The purpose of this work is to propose a simple densitometer based on measuring the frequency of created standing wave with a tube filled by a liquid under test. The developed approach is utilized to obtain a relationship between the density of some liquids and the frequency. The data acquisition and signal processing are carried out by LabVIEW software. It was shown that is a clear relationship between the frequency of standing wave created within a resonance tube in form of U-shape and the density of tested sample. This result can assist in production of cost-effective and portable densitometers.