In order for the Nitrate App to provide a good colour reading, it is important that all of the materials be clean and dry. In particular, the four black corner markers and the reference legend on the legend card should not be dirty or covered. Keep test strips sealed in a jar at room temperature until use.
A visual user guide is available here.
Required:
- Jar with test strips (for nitrate, use Hach test strips)
- Deltares legend card
- Smartphone with Nitrate App
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