Friday, December 30, 2016

Friday, November 18, 2016

Thursday, November 10, 2016

Saturday, October 29, 2016

Wednesday, September 21, 2016

Friday, September 2, 2016

Friday, July 1, 2016

Wednesday, March 2, 2016

NEW - Hanna Marine Alkalinity dKH Checker HI772

Hanna Marine Alkalinity dKH Checker HI772

Features at-a-glance:

  • Easier to use and more accurate than chemical test kits
  • Dedicated to a single parameter
  • Small size, big convenience
  • Ideal for: Aquaculture & Aquariums, Water Quality
  •  HI772 uses the same alkalinity reagent (755-26) as the HI755 alkalinity checker

The Hanna Marine Alkalinity (dKH) 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 color. 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. This level of instrumentation also offers greater resolution and accuracy, but can cost hundreds of dollars. The Hanna Marine Alkalinity 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 HI772 Checker®HC (Handheld Colorimeter) provides a simple, accurate and cost effective way to measure alkalinity in degrees of calcium hardness, commonly abbreviated as dKH. Critical to marine environments, alkalinity not only provides the carbonate ion required for calcium carbonate skeletal regeneration of coral reefs, but it also acts as a pH buffer against large changes in acidity. Designed as a more accurate alternative to chemical test kits, the HI772 provides quick, accurate results in four easy steps.


Range0.0 to 20.0 dKH
Resolution0.1 dKH
Accuracy @ 25°C/77°F±0.3 dKH ±5% of reading
Light SourceLED @ 610 nm
Light Detectorsilicon photocell
Methodcolorimetric method
Environment0 to 50°C (32 to 122°F); RH max 95% non-condensing
Battery Type(1) 1.5V AAA
Auto-offafter ten minutes of non-use
Dimensions86.0 mm x 61.0 mm x 37.5 mm (3.4" x 2.4" x 1.5")
Weight64 g (2.25 oz.)
Ordering InformationHI772 Checker® is supplied with (2) sample cuvettes with caps, alkalinity reagent starter kit for 25 tests (1 bottle of alkalinity reagent, 1 ml syringe and tip), ­­­ battery, instructions, and quick start guide.