Experimental equipment for an electrical resistance tomography of a gas lift flow

The article describes design of an experimental equipment for an electrical resistance tomography (ERT) of an air-water bubble multiphase flow. It reuses most of a circuit from a previous PIV experiment, with an exception of a measurement segment and adjacent pipes. The core components are two electrode rings each with 16 stainless steel electrodes smoothly embedded to its walls. The design is made modular, so it is possible to easily swap or modify its parts in case of need.