Electrical Resistance Tomography (ERT) provides the capability to measure the conductivity distribution within a given process plant delivering time evolving multi-dimensional information which often enhances fundamental process understanding whilst improving the design and operation of the process equipment. This paper reviews previous work undertaken using ERT for applications associated to wet particulate processing. The review is split into three sections including multiphase flow, solid-liquid suspensions and reactive particulate processing. Typical results from a number of examples from both, research and industrial environments are presented.