Abstract: An inline control and measuring systems connected to a continuous mixing process of a system for mixing solid or viscous materials with liquids and/or solvents to form the paste or viscous materials, and method thereof. Further there is a system and a method for producing viscous material, such as paste, in particular battery paste, with defined rheological properties for industrial applications. The system includes an extruder to discharge the paste through a supply line and one outlet of a plurality of outlets. The system further includes a bypass line for receiving a volume of the paste from the supply line and includes a plurality of pipes and a plurality of sensors. A controller is in communication with the extruder and the plurality of sensors. The controller receives signals indicative of pressure of the paste flowing through the pipes, determines viscosity of the paste based on the pressure of the paste.