This paper presents the state of the art in measuring multi-phase flow
s by using tomographic techniques. The results presented show a wide r
ange of industrial applications of process tomography from the nuclear
and chemical to the food industry. This is illustrated by examples of
the application of various tomographic sensors to the measurement of
geometric or kinematic parameters of multi-phase flows. An application
of process tomography for the validation of computational fluid dynam
ic models and the possibility of constructing a flowmeter for multi-ph
ase flow are addressed.