Diet is monitored in the softdrink plant producing diet softdrinks, and with a very accurate refractometer the concentration of diet syrup and finished diet product can be monitored both inline and with a laboratory instrument. The DR-10 Easy Diet laboratory analyzer is an innovative system for measuring the concentration of diet or sugar-free carbonated soft drinks. A single analyser that for concentration measurement can replace HPLC, spectrophotometry, titration and other manual systems and methods. The system is simple to use and provides accurate and consistent results without the need for a skilled operator. The analysis cycle is completely automatic and requires no sample preparation.