HI-719 MAGNESIUM HARDNESS HANDHELD COLORIMETER - CHECKER HC

The HI-719 pocket checker is a simple and accurate way to measure magnesium hardness.
The HI-719 uses an adaptation of the Standard Methods for the Examination of Water and Wastewater, 18th edition, EDTA colorimetric method. The reaction between magnesium and reagents causes a reddish violet tint in the sample.