Phosphate analyzer
Navigator AW642

Cost-effective automated monitoring of phosphate for steam raising applications.

The Navigator 600 phosphate analyzer provides reliable and highly accurate measurement of phosphate dosing in steam-raising boiler systems.



Many years of experience and innovation in the design and successful application of continuous chemical analyzers has been combined with the latest electronics and production technologies to produce the Navigator 600 Series of analyzers from ABB.

Based on colorimetric techniques, they feature a liquid handling section carefully designed to reduce routine maintenance. Utilizing powerful electronics, advanced features such as automatic calibration, continuous sample analysis and programmable multi-stream switching ensure accurate measurement of phosphate.

Users benefits from:

  • Analysis of up to 6 sample streams
  • Up to 90% lower reagent consumption than other phosphate analyzers
  • Labor-saving 5 minute annual maintenance and up to 3 months unattended operation
  • Automatic cleaning and calibration
  • True auto-zero compensates for sample color, turbidity and background phosphate in reagents
  • Intuitive software with full color graphical display
  • Data logging and graphical process trending
  • Full audit trail capability
  • Secure data archiving to SD Card



  • Measurement range
    0 to 15 ppm PO(minimum range 0 to 1 ppm)

  • Chemical method
    Molybdenum Blue

  • Sample stream options
    Available as single-stream or multi-stream (2, 4 or 6 stream) configurations

  • Measurement frequency
    Continuous chemistry and measurement (programmable sample rate for multi-stream)

  • Accuracy / maximum measured error
    ±3 % of reading or ±0.1 ppm (whichever is the greater) over the range 0 to 10 ppm PO4
    ±5 % of reading over the range 101 to 15 ppm PO4

  • Repeatability
    ±1.5 % of reading or ±0.05 ppm (whichever is the greater) over the range 0 to 10 ppm PO4
    ±2.5 % of reading over the range 10 to 15 ppm PO4

  • Response time
    <15 mins (90% step change)
    Minimum update time 12 mins for multi-stream configurations

  • Calibration
    2-point, automatic calibration


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