Description
The HI720 Calcium Hardness Checker HC (Handheld Colorimeter) is a portable, single-parameter photometer that provides a simple, accurate, and cost-effective way to measure calcium hardness (as CaCO₃) in freshwater samples. This Hanna HI720 Calcium Hardness Checker HC offers superior precision over traditional chemical test kits by delivering direct digital results, eliminating subjective color matching
| Specification | Detail |
|---|---|
| SKU | HI720 |
| Range | 0.00 to 2.70 ppm |
| Resolution | 0.01 ppm |
| Accuracy @ 25°C (77°F) | ± 0.20 ppm ± 5% of reading |
| Light Source | LED @ 525 nm |
| Light Detector | silicon photocell |
| Method | adaptation of the Standard Methods for the Examination of Water and Wastewater, 18th edition, Calmagite method. The reaction between calcium and reagents causes a reddish-violet tint in the sample |
| Battery Type | (1) 1.5V AAA |
| Auto shut-off | after ten minutes of non-use |
| Environment | 0 to 50°C (32 to 122°F) RH max 95% non-condensing |
| Dimensions | 86.0 x 61.0 x 37.5 mm (3.4 x 2.4 x 1.5in.) |
| Weight | 64 g (2.3 oz) |
| Reagent Set | HI720-25 (25 tests) |
| Calibration Check | HI720-11 |
| Warranty | 1 year |
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