The Milwaukee Mi413 is a photometer for measuring free and total chlorine. Milwaukee provides a range of chlorine photometers for all applications: swimming pool treatments, household cleaners, dishwasher additives, laundry powders/liquids and cooling water treatment products all contain chlorine as an oxidizing biocide. Drinking water contains residual chlorine to maintain water purity throughout the supply lines. Milwaukee offers the Mi413 microprocessor-based instrument measuring free (0.00 to 10.00 mg/L) and total (0.00 to 10.00 mg/L) chlorine.