The HI772 Marine Alkalinity (dKH) Checker HC from Hanna Instruments is designed to provide an accurate and cost-effective way to measure alkalinity in saltwater aquariums. This handheld colorimeter uses a fixed wavelength LED with a silicon photo detector, offering superior accuracy compared to traditional chemical test kits while remaining affordable. It measures the dKH range of 0.0 to 20.0 dKH with high resolution and is ideal for maintaining optimal water chemistry in marine environments.
| Range | 0.0 to 20.0 dKH |
| Method | colorimetric method |
| Weight | 64 g (2.25 oz.) |
| 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") |
| Resolution | 0.1 dKH |
| Environment | 0 to 50°C (32 to 122°F); RH max 95% non-condensing |
| Battery Type | (1) 1.5V AAA |
| Light Source | LED @ 610 nm |
| Light Detector | silicon photocell |
| 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. |
| Accuracy @ 25°C/77°F | ±0.3 dKH ±5% of reading |
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HI772 Marine Alkalinity (dKH) Checker HC
by Hanna Instruments
Test Kits
Reference reading: Species guide on Codexery
Species guides on Codexery
- Blue-legged hermit crab — Scientific name: Clibanarius tricolor · Distribution: Caribbean Sea source
- Peppermint shrimp — Scientific name: Lysmata wurdemanni · Family: Lysmatidae source
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