Hanna HI735-25 – Reagent Set for Total Hardness Low Range Checker HC (25 Tests)
The Hanna HI735-25 reagent set includes everything you need to perform 25 total hardness tests using the Hanna HI735 Low Range Checker HC. These reagents use the EPA-recommended Method 130.1, which involves a reaction between calcium, magnesium, and the chemical reagent—resulting in a red-violet tint. The Checker HC analyzes this color intensity to determine water hardness in ppm (mg/L) as CaCO₃.
Instead of preparing chemicals from scratch, users can rely on these pre-measured reagents for fast, reliable, and accurate results—whether in the lab or in the field.
Specifications
| Specification | Details |
|---|---|
| Test Range | 0 to 350 ppm (mg/L) as CaCO₃ |
| Resolution (via HI735) | 1 ppm |
| Accuracy @ 25°C | ±6 ppm ±6% of reading |
| Test Method | Colorimetric – EPA Method 130.1 adaptation |
| Reaction Color | Red-violet tint (color measured by HI735) |
| Reagent Format | Pre-measured packets or bottles (25 tests total) |
| Compatible Instrument | Hanna HI735 Checker HC |
Applications
Drinking Water Analysis
Monitor hardness levels in household or municipal water supplies.Boiler and Cooling Systems
Prevent scale buildup by testing water hardness regularly in industrial systems.Environmental Monitoring
Additionally, field teams can measure groundwater or surface water hardness on-site using these portable reagents.Aquaculture and Aquarium Testing
Ensure optimal hardness levels for aquatic life health and water balance.Precision Without Complexity
You don’t need to be a chemist to get accurate results. The reagents come pre-portioned, so all you need to do is add them to your sample and insert the cuvette into your HI735 Checker HC.Consistent, Repeatable Results
Since each reagent is manufactured to high-quality standards, you can perform multiple tests with consistent accuracy—without variation between batches.Compatible with HI735 Only
This reagent set is specifically designed for use with the HI735 Total Hardness Low Range Checker HC. When used together, they offer lab-grade performance in a portable format.Ideal for Low to Moderate Hardness Monitoring
With a range of 0 to 350 ppm, this reagent set is suitable for soft and moderately hard water applications, especially in residential, industrial, or environmental testing.
You must be logged in to post a review.






Reviews
There are no reviews yet.