HI755 – Marine Alkalinity Checker® HC

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The Hanna Marine Alkalinity 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. Professional instrumentation offers greater resolution and accuracy but can cost hundreds of dollars. 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

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.