Comparing the two methods of measurement
There are two principal electroacoustic methods available for measuring the characteristics of colloids, and they are capable of yielding the same information.
In one (the CVP or CVC) method, a sound wave of a certain frequency is established in a colloidal suspension and the resulting (very small) voltage, which is set up in the suspension, is measured.
In the other (the ESA method) an electric voltage (or field) is applied to the suspension and the properties of the resulting sound wave are measured.
Colloidal Dynamics has exclusive rights to develop the technology of the ESA and the CVP (CVC) method at multiple frequencies.
