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Free Residual Chlorine Dissolved Substance Detector Tubes
Detection Range: 0.4 - 5ppm
P/N 234SA

Immerse the end filled with the solution, with white end plug, into prepared sample solution. Capillary action will occur immediately and the solution sample will rise through the reagent. If Free Residual Chlorine is present in the solution sample, a discoloration will occur.