Dissolved O2 Analyzer

The EXA DO400 Dissolved oxygen (DO) analyzer system was developed to water quality in municipal water/wastewater treatment plants, as well as other processes requiring precise measurement of O2 in process liquids. The system features a microprocessor-based DO400 converter/transmitter and a PB30 floating ball probe that is said to provide fast response, long-term stability and low maintenance costs in monitoring applications from activated sludge to river water intake. The instrument is said to offer reliable measurement through built-in compensation for temperature, barometric pressure, and salinity levels, plus built-in air and saturated water calibration. Wide rangeability makes the unit suitable for aerobic and anaerobic processes. The unit incorporates on-line sensor diagnostics to ensure signal integrity and to monitor faulty readings, cabling errors and measuring loop disturbances. A simple YES/NO programming panel simplifies setup and respanning. Its PB30 floating-ball sensor resists buildup and requires only periodic cleaning and calibration.

Johnson Yokogawa Corporation, 4 Dart Road, Newnan, GA 30265-1040; Phone: (770) 254-0400, ext. 279;