Hach Hardness Test Kit, Model 5-B, 145300, Drop Count Titration

Water hardness is caused almost entirely by calcium and magnesium ions. Other divalent and trivalent metals have a similar effect, but usually are not present in high enough concentration in potable waters to cause problems. Hardness increases soap consumption in laundries and causes scale in boilers.

Features
- Range:1-30 gpg (grains per gallon)
- Smallest Increment:1 gpg (grains per gallon)
- Approx. Number of Tests: 100
- Case Size:2.75" x 2.75" x 5"
- Simple drop-count titration measures hardness as CaCO₃(1gpg = 17.1 mg/L)