Hanna Instruments Checker Marine Alkalinity Colorimeter (dKH)Information
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.
- Result in dKH - no conversion needed!
- Compact, portable design
- Built-in timer
- One button operation
- 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
- 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.)
- Hanna Marine Alkalinity (dKH) Checker HI772
- 2 - sample cuvettes with caps
- Alkalinity reagent starter kit for 25 tests (1 bottle of alkalinity reagent, 1 ml syringe and tip)
- Instructions, and quick start guide
How it works:
Press the button to power the meter on. Notice “Add C1” appears on the screen. You are now ready to begin testing.
Why Test Alkalinity?
Alkalinity is the ability of a system to buffer the pH of a system as acids are introduced. In saltwater systems, alkalinity is present in two main forms; carbonate (CO32-) and bicarbonate (HCO3-). Alkalinity is a critical parameter to check for in aquaculture, especially in reef aquariums where drastic pH swings would be catastrophic to corals. Further, alkalinity is important to the calcification of corals. The ideal range for alkalinity in reef aquariums is between 125-200ppm of calcium carbonate (7-11 dKH). Many test kits are available on the market that rely on a color change that needs to be judged by eye. The HI772 from Hanna makes alkalinity testing easy by simply mixing the sample with reagent and pressing a button.