For pneumatically conveyed amorphous solids, mass flow measurement is normally ascribed to the imprecise and interrupted measurement of weight or volume. Due to possibly high transport velocities and a fraction of quartz and other rough components, a non-invasive measurement principle is required. For most applications one has to emanate from non-conducting amorphous solids in an approximately homogenous flow. Cement powder has been chosen as an example for amorphous solids being pneumatically conveyed in dense phase flow. In most occuring mixing processes of amorphous bulk solids, neither the flow function nor the behavior of the transported material is restricted when already in the transportation process the later mixing component is injected in small amounts. Intention of the measureing system is to evaluate the transportation velocity and the velocity profile in the transportation pipe with a cheap and reliable equipment by exploiting the sensitivity distribution of an electrode configuration and the rheological decomposition of a well-directed, injected perturbation.
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