C-2511 Low Range Chlorine Comparator is a component of K-2511 Chlorine (free and total) ULR CHEMets Visual Test Kit and is designed to be compared against the color formed in R-2511 Chlorine ULR CHEMets Refill. The comparator's range is applicable for many disinfection and drinking water applications. Color standards are pink in color and cover a range of 0 to 0.20 ppm chlorine (Cl₂).