Dual acoustic and electrical analysis technique for the tomographic determination of multiphase flows in pipes and/or liquid/froth interfaces in process tanks

Apparatus for determining information about “phases” in a multiphase flow or process volume, comprising:

• a Dual Modality Tomographic (DMT) single probe configured to arrange in either a pipe having a multiphase flow or a process tank or vessel having a process volume, and also configured to sense at least two tomographic modalities that include electrical probing and speed of sound characteristics of the multiphase flow or the process volume, and provide signaling containing information about the at least two tomographic modalities sensed;
• and
• a signal processor or processing module configured at least to:
• receive the signaling, and
• provide corresponding signaling containing information about different fluid layers in the multiphase flow or process volume using a DMT technique that combines an electrical probing and speed of sound analysis, based at least partly on the signaling received.