2-Wire 24VDC Transmitter / Analyzer DO202
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 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 Pharmaceutical 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), OXYFERM, OXYGOLD (for ppb measurement)


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