Used for quick and accurate detection of residual chlorine concentration in water samples. Ideal for monitoring disinfection processes in drinking water, swimming pools, and wastewater treatment. Each tablet provides a color change corresponding to chlorine levels between 0–10 ppm, allowing easy interpretation via color chart comparison. Compact and easy to use in field testing with no need for complex instruments. Suitable for routine quality control in public health, environmental monitoring, and sanitation inspections.