Calcium Hardness

Photometric test for Calcium Hardness in pool, spa, treated and natural water

Colour Change: Violet to Orange
Range:: 0 - 500 mg/L CaCO₃
Technical Resource:: Calcium Hardness Test Method, Technical Information
Notes:: Strongly acidic or alkaline samples should be adjusted to within pH 4 to pH 10 prior to starting the test

Fill to the 10 mL line with sample.

Use this to "blank" the instrument. Place in cell holder and press Blank.

Prepare sample by adding a Calcicol No1 tablet. Crush and stir.

Then, add a Calcicol No2 tablet. Crush and stir.

Place in the cell holder and press Measure.

Allow timer to count down 2 minutes. The concentration of Calcium will then be displayed.