Fluid Metering System

A fluid metering system, comprising:

• a main tank storing a main fluid;
• a mixing unit fluidly connected to said main tank;
• a pump fluidly connected to said mixing unit;
• a first additive tank storing a first fluid;
• a first measuring tube fluidly connected to said first additive tank;
• a first fill valve fluidly connected between said first additive tank and said first measuring tube;
• a first injection valve fluidly connected between said first measuring tube and said mixing unit;
• and
• a control unit in communication with said first fill valve and said first injection valve, wherein said control unit controls a state of said first fill valve and said first injection valve for a fill process and for a dosage process, wherein said control unit opens said first fill valve and closes said first injection valve during said fill process thereby filling said first measuring tube with said first fluid, and wherein said control unit closes said first fill valve and opens said first injection valve during said dosage process thereby adding said first fluid from said measuring tube to said main fluid within said mixing unit.