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The liquid alternative to DPD tablets can be used with existing LaMotte® chlorine comparators or colorimeters. DPD 1A and DPD 1B are added to a 5 or 10 mL sample to test free available chlorine. DPD 3 is added to the reacted sample to measure total chlorine. Also, liquid reagents are available to measure pH, hardness, alkalinity, copper and other liquid reagents.
LaMotte® P-6741-H DPD 1B Free Chlorine Reagent, Liquid, 60 mL