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Tests water for Free Available Chlorine, Monochloramine, Dichloramine, and Total Residual Chlorine using DPD tablets and Octa-Slide 2 Comparator; range and sensitivity is 0.2, 0.4, 0.6, 0.8, 1.0, 1.5, 2.0, 3.0 ppm Cl; 50 tests. Use for industrial water boiling and cooling, water and wastewater applications