Hanna Marine Calcium Checker HC-HI758 Electronic Test Kit

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The Marine Calcium Checker by Hanna gives easy, accurate and fast results for measuring Calcium in your marine aquarium

Marine Calcium Checker HC - HI758

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The Hanna Marine Calcium Checker bridges the gap between simple chemical test kits and professional instrumentation.

Chemical test kits have limited accuracy and resolution since they rely upon the human eye to discern differences in colour.

Professional instrumentation incorporates a light source such as an LED or tungsten lamp with a filter and a light sensing detector to precisely determine absorbance and ion concentration.

Professional instrumentation offers greater resolution and accuracy but can cost hundreds of dollars.

The Hanna Marine Calcium Checker uses a fixed wavelength LED and silicon photo detector to provide the accuracy of professional instrumentation at the affordable price of a chemical test kit.


The HI758 Checker HC (Handheld Colorimeter) provides a simple, accurate and cost-effective way to measure calcium.

Required for the development of calcium carbonate skeletons of coral reefs, calcium is a crucial component of marine waters.

Designed as a more accurate alternative to chemical test kits, the HI758 provides quick, accurate results in four easy steps:

How to use Hanna Checker Handheld Colorimeter
  • *To zero: 1 ml of reagent A is added to deionized/distilled water as a blank.

  • Features at-a-glance:
  • Easier to use and more accurate than chemical test kits
  • Dedicated to a single parameter
  • Small size, big convenience

  • Calcium
  • Calcium Range 200 to 600 ppm
  • Calcium Resolution 1 ppm
  • Calcium Accuracy ±6% of reading
  • Calcium Method adaptation of the Zincon method.

  • Automatic Shut-Off after ten minutes of non-use
  • Battery Type/Life (1) 1.5V AAA
  • Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing
  • Dimensions 81.5mm x 61mm x 37.5mm (3.2" x 2.4" x 1.5”)
  • Weight 64 g (2.25 oz.)
  • Photometer/Colorimeter Light Source LED @ 610 nm
  • Photometer/Colorimeter Light Detector silicon photocell

    HI758 Calcium Checker is supplied with (2) sample cuvettes with caps, calcium reagent starter kit for 25 tests, dropper, (2) 1 ml syringes with tips, battery, instructions and quick start guide.

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