Hach Water Hardness TNTplus Vial Test

For photometric determination of Water Hardness (Calcium + Magnesium) by the Metalphthalein method.


  • Easy and safe handling
  • No reagent blank necessary
  • Automatic method detection
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Water Hardness TNTplus chemistry and your Hach spectrophotometer are engineered to simplify water analysis for accurate results, everytime.

For photometric determination of Water Hardness (Calcium + Magnesium) by the Metalphthalein method. Traditional Magnesium measurement has often involved time consuming titrations requiring expensive glassware and subjective end point determination by difficult to see color changes.

With Water Hardness TNTplus reagents, simply add included reagents and sample to the vial, invert to mix, and insert into your Hach spectrophotometer! The Direct Read Technology will provide your Calcium, Magnesium and Water Hardness results to the nearest mg/L! No more cleaning glassware, dealing with large amounts of waste, and worrying about human errors.

Upgrade from traditional titration based methods to TNTplus Water Hardness reagents today! 25 Water Hardness vials per box.

  • EPA compliant: N/A
  • Instrument: DR3900, DR6000, DR1900, DR2800, DR3800, DR5000
  • Method: 10293
  • Method Name: Metalphthalein
  • Number of tests: 25
  • Parameter: Water Hardness
  • Platform: TNT plus™
  • Range: 20 - 350 mg/L as CaCO₃
    5 - 100 mg/L Ca
    3 - 50 mg/L Mg
  • Shelf Life: 12 months from production date
  • Special Remarks: 3 parameters within 1 test.
  • Storage Conditions: 15 - 25 °C
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Hach Water Hardness TNTplus Vial Test
Water Hardness TNTplus Vial Test (20 - 350 mg/L as CaCO₃), 25 Tests
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