DO202 2-Wire Dissolved Oxygen Analyzer (DISCONTINUED)

Notice: This product was discontinued on Apr 30, 2015. See this replacement product:

Flexibility, reliability and low maintenance are among the benefits provided by the EXA DO202 Dissolved Oxygen 2-wire transmitter. Designed to meet the exacting requirements of Dissolved Oxygen analysis in the modern industrial environment, it contains many features to ensure the best precision whatever the application.

DO202 is housed in a rugged IP65 enclosure and is a loop powered 2-wire transmitter to combine safe and simple wiring, installation and commissioning with the advanced functionality of the YOKOGAWA EXA microprocessor analyzer family.

The DO202 is a SMART transmitter. Digital communication is done either through HART® protocol superimposed on the 4- 20 mA current or completely digital through Fieldbus communication: Fieldbus Foundation. This SMART functionality allows the transmission of up to four process variables, information stored in the logbook, diagnostic data and remote configuration of the analyzer.

Yokogawa has developed drivers for PC configuration and maintenance software for different platforms like PRM, AMS and Pactware. The DO202 transmitter is a universal Dissolved Oxygen Transmitter that accepts both galvanic sensors like DO30 and Polarographic sensors like OXYGOLD and OXYFERM. It is suitable for both ppm Pharmacuetical applications as well as ppb applications for Power Generation.

  • Universal input accepts Galvanic and Polarographic sensors and various temperature compensating elements (Pt1000, 22k NTC)
  • HART® communication standard with 4-20 mA loop powered model
  • Fieldbus models for Fieldbus Foundation
  • Wide measuring range including ppb, ppm and % saturation
  • Certification for hazardous area pending (ATEX, FM, CSA)
  • Recommended sensors model DO30(G) , PB30, OXYFERM, OXYGOLD (for ppb measurement)

Most zinc are produced at hydrometallurgically, where a high-grade zinc product can be obtained and valuable metals mixed in the raw material can be recovered. In the hydrometallurgy, the raw material of zinc concentrate is roasted and then dissolved in sulfuric acid to remove impurities. The process called leaching and pH control of the leachate is important.

Industry:Chemical, Power

Application Note
Application Note

Fish perform all their bodily functions in water. Because fish are totally dependent upon water to breathe, feed and grow, excrete wastes, maintain a salt balance, and reproduce, understanding the physical and chemical qualities of water is critical to successful aquaculture. To a great extent water determines the success or failure of an aquaculture operation.


In stable dispersion of fine particles is the pre-requisite for the selective flocculation technique involving separation of ultra-fine valuable particles from the gangue. Among mineral processing techniques selective flocculation technique is known to have outstanding potential of capturing the particles of particular mineral in slurry of mixed mineral system by selective adsorption of water soluble polymers known as flocculants.

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