The CT series force transducers, have been specially designed for use in polymer processing in applications where it is required to measure the reaction force produced by the extru-sion pressure on the gearbox along the axis of the screw. They measure a force whose value is indicative of the extrusion pressure over the area of the screw. The CT series force transducers can also be used in all other applications where it is required to measure the forces on shafts or columns and in any application where the geometry demands a toroidal form load cell.