The Florida Water Environment Assn. chose the Central Pasco County Beneficial Water Reuse Project, the 4G Wetlands, as the winner of its 2016...
Device is recommended for freshwater treatment plant filtration systems
Electro-Chemical Devices (ECD) has introduced the CDA-22 Chlorine Dioxide Analyzer, which is designed to support raw water treatment filtration systems. Featuring a panel-mounted plumb-and-play design and automatic flow control, the CDA-22 is a complete chlorine dioxide (ClO2) measurement system.
The CDA-22 Chlorine Dioxide Analyzer can run for up to one year between electrolyte/membrane changes. It incorporates a CIO2 sensor, an automated flow control device and an analyzer/controller mounted on a PVC panel. Installation is completed after connecting the sample and drain lines, power and outputs, and calibration is accomplished with DPD comparison.
The CDA-22 features a polarographic gold/silver PTFE membrane amperometric CIO2 sensor. While these types of sensors are flow-sensitive, the CDA-22's output is virtually flow-independent at values greater than 0.5 ft/sec. The CDA-22’s "constant head" flow control device maintains the sensor’s optimum flow over a wide range of incoming sample flow rates, from 10–80 gal/hr.
The CDA-22’s sensor operates at a wide temperature range of 0 to 100ºC (32 to 212°F). Because temperature affects the CIO2 permeability of the PTFE membrane, increasing the temperature increases the output of the sensor approximately 4% per C°. The chlorine flow cell includes a temperature sensor that allows the C22 analyzer to perform automatic temperature compensation of the measurement.