Description
              
	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.
	 
	Compact, Portable Design
	Built-in Timer
	One Button Operation
	 
	 
	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:
	 
	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
	 
	 
	Specifications
	Range 0.0 to 20.0 dKH
	Resolution 0.1 dKH
	Accuracy @ 25°C/77°F ±0.3 dKH ±5% of reading
	Light Source LED @ 610 nm
	Light Detector silicon photocell
	Method colorimetric method
	Environment 0 to 50°C (32 to 122°F); RH max 95% non-condensing
	Battery Type (1) 1.5V AAA
	Auto-off after ten minutes of non-use
	Dimensions 86.0 mm x 61.0 mm x 37.5 mm (3.4" x 2.4" x 1.5")
	Weight 64 g (2.25 oz.)
	Ordering Information HI772 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.