Color Disc, Nitrite Nitrogen LR

Color disc for measuring Nitrite Nitrogen, 0-0.4 mg/L NO₂-N. Used in test kit Models NI-12 (Prod. No. 1408100), NI-15 (Prod. No. 2182000), FF-2 (Prod. No. 243001), FF-1A (Prod. No. 243002), and FF-3 (Prod. No. 243003).