Titrant Kit Total Hardness with indicator tube ideal to measure the water hardness
Instructions
1. Rinse the measuring vessel with the water to be tested and fill up the 5 ml mark.
2. Add 1-2 drops of indicator and swirl. In presence of hardness higher than 3 ppm CaCO3 a wine red colour will appear (A blue color indicates absence of hardness. With hardness lower than 3 ppm the colour of the sample shifts from violet. to gray to pink).
3. Add titrant drop by drop. mixing after each addition. Count the drops until the colour changes from red to blue. Each drop correspondes to 1° fr degree (1° fr = 10 ppm CaCO3).
4. For softened water. fill the vessel to the 10 ml mark and add 2-4 drops of indicator. Each drop of titrant corresponds to 0.5° fr degrees.
