Separate test kits for chemical analysis of water samples without the need for extra apparatus or previous chemical knowledge. The VISOCOLOR ® card color templates are keyed to the original colors of freshly prepared standard solutions, thus ensuring fine resolution, precision and reproducibility of the measurement results.

Instructions in German, English, French, Italian, Spanish, Dutch.

Measuring ranges: Nitrate - 0 • 1 • 3 • 5 • 10 • 20 • 30 • 50 • 70 • 90 • 120 mg/L NO₃⁻
Number of tests: 110