Ръчен колориметър, HI7754, Hanna Instruments, алкалност на сладка вода, серия Pool Line, Checker®HC

The HI7754 Pool Line Checker measures alkalinity in the range of 0-500 ppm for pools, spas, and hot tubs. It provides accurate readings in four easy steps.

• The description claims that alkalinity is the ability of a solution to resist changes from acid to base.
• The description claims that high alkalinity can make adding acid or base ineffective on pH.
• The description claims that low alkalinity can cause extreme pH changes with small additions of acid or base.
• The description claims that the optimal alkalinity range is 80 to 120 mg/CaCO3.