This sophisticated dosing unit controls external solenoid valves for the liquefaction of powder or block detergents and measures and regulates the conductivity of the mixing ratio in the detergent circulation tank. In addition, it doses rinse aid via an integrated dosing pump and can control further additives via external pumps. The display allows individual configurations and operating and status messages as well as an optional event storage and read-out option. The PDG 2906 is optimal for precise measurement and control as well as economical dosing.