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Process Liquid Analytical

Sensors, analyzers and transmitters for on-line liquid analytical measurements

Sensors, analyzers and transmitters for on-line measurements of pH, ORP, ion selective electrode activity, conductivity, resistivity and dissolved oxygen.

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Process Liquid Analytical
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Process Liquid Analytical

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        873DO Dissolved Oxygen Analyzer

        873DO / EC / RS Analyzer The Foxboro 873DO is a line-powered, dual sensor input dissolved oxygen analyzer. The 873DO analyzer is used with the 871DO-C sensor for parts-per-million measurements of dissolved oxygen in aeration basins, industrial and municipal wastewater treatment plants, and aquaculture applications. When used with the 871DO sensor, the 873DO offers several sensor diagnostic features. The analyzer periodically monitors the sensor for membrane fouling, membrane breakage, and loss of internal filling solution. Calibration of the 873DO is quick and simple, achieved by allowing the sensor to stabilize in ambient air. Each 873DO analyzer provides two analog output signals (4-20 mA, 0-10 V, 0-20 mA) and two alarm relays. A choice of plastic, panel-mount or metal, field-mount enclosure is available. Each enclosure is ¼ DIN. The metal enclosure is rated NEMA 4X, while the plastic enclosure is NEMA 12 from the front and NEMA 1 from the rear.


      • Cost effective installation as two sensors can be connected to a single analyzer
      • Fast and easy air calibration reduces maintenance time and cost
      • Sensor diagnostics helps predict when a sensor needs to be serviced
      • 24/7 expert technical and application support

      • Applications

      • Aeration basins
      • Industrial waste water treatment plants
      • Municipal waste water treatment plants
      • Aquaculture measurements

    Documents and Downloads (2)

    Specification guide
    873 Series Electrochemical Analyzers pH, ORP, Ion Selective, Contacting Conductivity, Electrodeless Conductivity, Resistivity, and Dissolved Oxygen (Version 2.0) 8/15/18 English pss_6-1c1e_d.pdf2.2 MB
    Instruction sheet
    873DO Series Electrochemical Analyzers for Dissolved Oxygen Measurement Style C (Version 1.0) 4/8/16 English mi_611-169.pdf1.9 MB