Marine Alkalinity Checker® HC - HI755

SKU: HI755

Ships within 5-10 Business Days

The Hanna Marine Alkalinity Checker bridges the gap between simple chemical test kits and professional instrumentation. Don't worry about the subjectivity of color charts, trust our handheld colorimeter for accurate measurements of your water testing. The Hanna Marine Alkalinity Checker measures alkalinity in parts per million (ppm) of calcium carbonate (CaCO3), using a fixed wavelength LED and silicon photo detector to provide the accuracy of professional instrumentation at the affordable price of a chemical test kit.

  • Compact, Portable Design
  • Built-in Timer
  • One-Button Operation


Ideal for: Aquaculture, Water Quality, Environmental, Education, and Industrial use

The HI755 Checker®HC (Handheld Colorimeter) provides a simple, accurate and cost-effective way to measure alkalinity.  Crucial in marine environments, alkalinity provides both the carbonate ion required for calcium carbonate skeletal regeneration of coral reefs, as well as a pH buffer against large changes in acidity.  


Designed as a more accurate alternative to chemical test kits, the HI755 provides quick, accurate alkalinity results in four easy steps:

How to use Hanna Checker Handheld Colorimeter


Easier to use and more accurate than chemical test kits

Dedicated to a single parameter

Small size, big convenience


More Information
Product Name Marine Alkalinity Checker® HC - HI755
Quote Required No
Seawater Alkalinity Range 0 to 300 ppm
Seawater Alkalinity Resolution 1 ppm
Seawater Alkalinity Accuracy ±5 ppm (mg/L) ±5% of reading
Seawater Alkalinity Method colorimetric method.
Photometer/Colorimeter Light Source LED @ 610 nm
Photometer/Colorimeter Light Detector silicon photocell
Battery Type/Life (1) 1.5V AAA
Automatic Shut-Off after ten minutes of non-use
Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing
Weight 64 g (2.25 oz.)
Dimensions 81.5mm x 61mm x 37.5mm (3.2" x 2.4" x 1.5”)
Ordering Information HI755 Checker® is supplied with (2) sample cuvettes with caps, alkalinity reagent starter kit for 25 tests (1 bottle of alkalinity reagent), ­­­(1) battery, instructions and quick start guide.
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