The main components of the TAMU-UPC multipurpose cell were designed and manufactured by the Universitat Politecnica de Catalunya, Barcelona, Spain, in the context of a research collaboration with Texas A&M University. It is a high-capacity (up to 12MPa) stainless steel cell. It can host an Engineered Barrier System (EBS) prototype (encompassing both clay-barrier and host-rock). Repository confinement conditions can be replicated by controlling the pressure in the chamber. The device can also be used as a triaxial cell. A twin Wille volume/pressure controller is used to control the cell pressure and the deviatoric stress. Two GDS volume/pressure controllers control the pressure at the bottom and top pedestal. A high capacity (up to 20MPa) Wille volume/pressure controller is used to impose the gas flow rate (or applied the gas pressure) during the gas breakthrough tests. A heating unit enables conducting tests at different temperatures, and thermocouples track the temperature evolution at different positions in the EBS prototype. Nitrogen cylinders act as a reservoir of purified Nitrogen gas. The Geolab software system controls the experimental setup and data collection during the tests. A mass flowmeter is used to monitor the gas volume and flow rate permeating through the barrier material. This apparatus is mainly used in this project to determine the gas flow characteristics at the contact between different barrier materials (e.g. clay-barrier - rock) and the corresponding breakthrough pressure at different temperatures.