CDA-22 chlorine dioxide analyzer

The CDA-22 chlorine dioxide (ClO2) analyzer features a panel-mounted plumb-and-play design and automatic ?ow control in a low-maintenance complete measurement system for monitoring and control of chlorine dioxide ClO2 in municipal water systems, industrial cooling and rinse water, wastewater, or fresh water. It uses a polarographic gold/silver polytetra?uoroethylene (PTFE) membrane amperometric ClO2 sensor to measure ClO2 concentrations ranging from 0.05 ppm to 20 ppm. The analyzer/controller is mounted on a PVC panel and features a 2.5-in. × 1.75-in. backlit LCD display with four lines for text and graphics. It offers dual measurements, an XY graphical plot, and an optional PID control output. The analyzer requires no expensive reagents and eliminates pressure regulators and rotometers. It provides a 4–20 mA output proportional to the measured ClO2 concentration, and two alarm relays (single-pole, double-throw [SPDT] 230 VAC/5A or 30 VDC/5A); additional 4–20-mA outputs for pH or temperature and up to six additional relays can be included.