Able to deliver reliable disinfection measurements at low flow rates, the Endress+Hauser Memosens CCS50D chlorine dioxide sensor assists in producing pathogen-free cooling water and high-quality process water for cooling systems, packed vegetables and salads, and beverage production. It features a convex membrane made of a dense, dirt-repellent material that prevents soiling and resists biofouling. Ultrasonic welding of the membrane to the sensor cap prevents dilution of the electrolyte, while contactless data transmission eliminates measurement errors and failures caused by humidity or corrosion.