Abstract: With a Coriolis mass flow meter a mass flow through a pipe is determined by exerting a force and/or moment on at least one location on the pipe, such that vibrations of several vibration modes are excited. The magnitude is determined of the force and/or the moment with which the pipe is excited. The response of the pipe is measured at multiple locations between two clamping points of the pipes, at excitations with several different frequencies. The sensitivity of the response to the mass flow is calculated on the basis of a model which comprises as free parameters the mass flow and model parameters which determine the sensitivity, wherein the mass flow and the model parameters are estimated that correspond with the combination of the force and/or the moment and the response measured for the different frequencies.

Abstract: A method for characterizing a suspension with particles floating therein, which method comprises the steps of generating an acoustic actuation signal and registering an acoustic reflected signal. Further, a first dataset is calculated on the basis of the reflected signal, the dataset containing information which represents an autocorrelation function as a function of time of the reflected signal. Thereupon, first datasets are combined into a second, cumulated dataset, which represents a sum of the autocorrelation functions which correspond with the first datasets. Finally, a representation of a particle size distribution is determined by solving this representation from an expression for the second, cumulated dataset in terms of the representation of a particle size distribution.