The low-maintenance, economical CDA-22 chlorine dioxide analyzer features a panel-mounted, plumb-and-play design and automatic flow control. It is a complete chlorine dioxide (ClO2) measurement system. Easy to install and maintain, it can run for up to a year between electrolyte/membrane changes, and features a polarographic gold/silver PTFE membrane amperometric ClO2 sensor. Its output is flow-independent at values greater than 0.5 ft/sec.