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Hardness: - Water hardness is caused almost entirely by calcium and magnesium ion. Other di- 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.
- Simply count the number of drops required to change the solution color to determine hardness concentration.
| Method / Chemistry | Range | Smallest Increment | Approx. Number of Tests | Case Style | | Drop count titration/EDTA-Powder Pillows | 1-30 gpg | 1 gpg | 100 | 8.3x2.6x5.75 inches Blue Polypropylene Carrying Case |
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 Parameter/Range/Reagent Information
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Related Product Information: |
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Hardness (Total) Test Kit, Model 5-EP MG-L, Drop Count Titration, 20-400 mg/L, 100 tests
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Hardness (Total) Test Kit, Model HA-71A, Drop Count Titration, Dual Range, 100 tests
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Hardness and Iron Test Kit, Model HA-95A, Color Cube
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Hardness, Iron, and pH Test Kit, Model HA-62A, Color Disc
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