The FMU-1 product is a tensiometric system that is useful to keep the tension of the rolled or unrolled material constant and to measure in order to avoid product breakages and machine jams with consequent production stops. This tool is particularly useful during the production of paper but it has been designed to meet any other application requirement: steel tape equipment, conveyors for mines, felts, dryers, calenders, painters and laminators, winders and rewinders.