Abstract: A method for determining the concentration of a large particle component in a multi-component system. The method requires first separating and concentrating the large particle component of the system by acoustic means and then measuring an acoustical parameter of the separated large particle component. The invention also provides for an apparatus for determining the concentration of large particles in a multi-component fluid system. The apparatus is comprised of an acoustic standing wave resonator, at least one acoustic standing wave generating source, electronic circuitry for actuating, controlling and processing the acoustic standing wave generating source and means for measuring at least one parameter of the multi-component system after the large particles have been concentrated and aggregated by the generated standing wave(s).

Abstract: A method for determining the concentration of a large particle component in a multi-component system. The method requires first separating and concentrating the large particle component of the system by acoustic means and then measuring an acoustical parameter of the separated large particle component. The invention also provides for an apparatus for determining the concentration of large particles in a multi-component fluid system. The apparatus is comprised of an acoustic standing wave resonator, at least one acoustic standing wave generating source, electronic circuitry for actuating, controlling and processing the acoustic standing wave generating source and means for measuring at least one parameter of the multi-component system after the large particles have been concentrated and aggregated by the generated standing wave(s).

Abstract: A method and apparatus for analyzing a fluid to obtain the concentrations of N of its components, N being at least three. The method comprises the steps of bringing a sample of the fluid to a plurality of successive temperatures, measuring a combined total of at least N acoustical and electrical parameters of the sample at each temperature, and determining simultaneously from the measured acoustical and electrical parameters, using a system of N linear equations, the concentrations of the N components. The apparatus combines acoustic and electrical measuring elements in one unit.

Abstract: A method for measuring liquid flow, comprising the steps of delivering the liquid into a measuring cell having a measuring slot with at least one isolated electrode and at least two non-isolated electrodes, inducing fluctuations in the liquid flowing in the measuring slot, measuring electrical capacitance and electrical phase shifts correlated with the fluctuations, as well as a conductivity of the liquid, and obtaining flow parameters of the liquid from the electrical parameters. An apparatus for measuring the properties of a flowing liquid, comprising at least one measuring cell having at least one measuring slot, means for inducing flow fluctuations in the flowing liquid, and measuring means used to obtain liquid properties from the flow fluctuations.

Abstract: A method and apparatus for analyzing a fluid to obtain the concentrations of N of its components, N being at least three. The method comprises the steps of bringing a sample of the fluid to a plurality of successive temperatures, measuring a combined total of at least N acoustical and electrical parameters of the sample at each temperature, and determining simultaneously from the measured acoustical and electrical parameters, using a system of N linear equations, the concentrations of the N components. The apparatus combines acoustic and electrical measuring elements in one unit.