Water is the core foundation for industrial production and people's livelihood. Residual chlorine, as a key residual indicator after water disinfection, has a concentration that is directly related to water quality safety, production compliance, and environmental protection. Industrial residual chlorine transmitters, as core equipment for measuring the concentration of hypochlorous acid and hypochlorite in water, are widely used in drinking water treatment, industrial circulating water automation, swimming pool operation and maintenance, hospital wastewater treatment, and many other fields. Their operational stability, measurement consistency, and ease of operation have become core considerations for enterprises when selecting such transmitters.