For determination of Dissolved Oxygen by Digital Titrator titration, using the Winkler Azide Modification method. Hach Method 8215. Range: 1 - 10 mg/L Set Includes: Alkaline Iodide-Azide Powder Pillows, Manganous Sulfate Powder Pillows, Sodium Thiosulfate Digital Titrator Cartridge (0.200 N), Starch Indicator Solution and Sulfamic Acid Powder Pillows for approximately 50 tests.