Reagent set for the determination of Total Hardness by EDTA Digital Titrator titration (Hach method 8213). Range: 10-160 mg/L as CaCO3. Set contains: Buffer Solution (Hardness 1), ManVer® 2 Hardness Indicator Powder Pillows and 0.0800 M EDTA Digital Titrator Cartridge for 40 - 100 tests.