"Are you looking for real-time monitoring of chlorine dioxide to inform your process decisions? The 9187 sc Chlorine Dioxide (ClO2) Sensor is an online, single-channel industrial sensor that measures ClO2 in drinking water treatment plants, distribution networks, and other applications that require monitoring ClO2 at ppb and ppm levels. Do you need a reagent less solution for your online chlorine dioxide analysis? The all-inclusive 9187 sc chlorine dioxide system comes pre-assembled on a panel. Just mount the panel in the desired location, insert the sensors, and connect the controller to get started. The membrane system of the sensor means there are no reagents used for measurement. Maintenance is minimal and two years of typical maintenance items are included with the system."