Disinfection Sensors Amperometric Disinfection Sensors Walchem’s amperometric disinfection sensors offer a cost effective and reliable solution to your disinfection control requirements. Compatible with the WDIS and WebMaster® series controllers, the sensors continuously and directly measure the chemical concentration, without the use of reagents. We offer sensors, in varying ranges of concentration, for free chlorine/bromine, total chlorine, chlorine dioxide, ozone, peracetic acid and hydrogen peroxide. Whether the application is a cooling tower, food and beverage, drinking water, wastewater, or swimming pool, these sensors are the ideal solution. Summary of Key Benefits Low maintenance - no costly reagents or tubing to replace Broad range of applications - wide variety of oxidizers and measurement ranges Fast response - continuous measurement technique No waste - the sample can be returned to the process Free Chlorine/ Bromine Range (Nominal) Free Chlorine/Bromine - Extended pH Range Total Chlorine Chlorine Dioxide Peracetic Acid Hydrogen Peroxide Range (WDIS) Range (WIND) HOCl (100%) HOBr (100%) Ozone ClO2 (900%) NOT for use with isocyanuric acid or stabilized bromine HOCl (100%) HOBr (100%) Ozone ClO2 (100%) HOCl with isocyanuric acid NOT for use with stabilized bromine Flow rate of sample H2O2 (100%) Chlorine PAA Ozone (none may be present) 6.8 – 8.0 (pH must be stable within ± 0.10) Conductivity range of sample Response time Conditioning time

Free Chlorine/Bromine Sensor, 20 ppm Free Chlorine/Bromine Sensor, 2 ppm Free Chlorine/Bromine Sensor, 200 ppm Free Chlorine/Bromine Sensor, ext. pH range, 20 ppm Total Chlorine Sensor, 20 ppm Chlorine Dioxide Sensor, 20 ppm Chlorine Dioxide Sensor, 2 ppm Chlorine Dioxide Sensor, 200 ppm Ozone Sensor, 20 ppm Peracetic Acid Sensor, 2000 ppm Peracetic Acid Sensor, 200 ppm Peracetic Acid Sensor, 20,000 ppm Peracetic Acid Sensor, PEEK, 2000 ppm (Acrylic Flow Cell) Peracetic Acid Sensor, PEEK, 20,000 ppm (Acrylic Flow Cell) Hydrogen Peroxide Sensor, 2000 ppm Hydrogen Peroxide Sensor, 200 ppm Hydrogen...