Sound velocity depends on density and on the compressibility of a material. The distance between the sound transmitter and sound receiver is known. The sound velocity can easily be calculated by measuring the travel time of the sound signal. Using a calibration equation from the velocity and the temperature, the resulting concentration can be calculated.

Other typical applications are: phase interface detection; multi-component analysis; or monitoring and control of crystallization or polymerization processes.

The electronics require a time measurement which can be realized digitally with outstanding accuracy and long time stability. Sound velocity analyzers have no moving parts; therefore there is no long time degradation of their mechanical properties. Using this sensor technology, the user will have several advantages against competitive methods.