The SOMOS® Gramix TwinDos dosing system supplies twin screw extruders in the "underfed" mode required for such extruders. Optimized hardware and control software ensure extremely short system response times, the weighing electronics operating with 24 bit signal resolution. For example, the system even responds automatically to changing regrind consistencies and optimizes itself by appropriately readjusting the metered components. No software adaptation (e.g. using appropriate material characteristic curves) is required for this purpose. The closed dosing system releases little dust and can be installed directly on the processing machine, so saving space.