These advanced models are particularly suited for use with Bender elements. The design of the cell ensure vertical alignement of the cell ram by clamping the Perspex wall separately from the cell top. The cell wall is banded to prevent excessive expansion during the test and to protect against explosive failure when used with compressed air systems. The Tri-Cell Plus cells include a transducer axis ring with six outlets for on-sample transducers cables (i.e. radial and axial transducers, mid height pore water pressure transducers, etc.) or for measurements with Bender elements. They are also suitable for extension tests.