The original Hach test kit!
Simple drop-count titration measures hardness as grains per gallon CaCO₃ (1 gpg = 17.1 mg/L). Utilizes drop count titration with a range of 1-30 gpg.
Contains approximately 100 tests.

Hardness Test Kit, 5B

SKU: 145300
    • Utilizes drop count titration - a simple, economical titration method