Color Disc for measuring Nitrite Nitrogen, 0-100, 0-2000 mg/L. Used in test kit Model NI-6 (Prod. No. 224000) and Model PBC-DT (Prod. No. 2350700).
The most accurate visual test kit method, Hach colo
The most accurate visual test kit method, Hach color discs provide fast, accurate comparisons
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