Solutions for Industries and Automation
ABB Measurement and Analytics - Quad Industry GmbH

AAM631 – ABB Ammonia analyzer Aztec

AAM631Providing continuous ammonia analysis for optimization of nutrient removal
The Aztec 600 ISE ammonia analyzer provides reliable and accurate measurement of ammonia concentrations for a wide variety of applications including source water monitoring and wastewater nutrient removal.

The Aztec 600 ISE ammonia analyzer uses a robust gas sensing ammonia electrode to provide accurate and reliable continuous measurement of the total ammonia nitrogen (TAN) concentration, that is the sum of the gas NH3 and the cation NH4+.

Featuring ABB’s intuitive menu-driven software and the robust ISE sensing system with automatic calibration, users benefit from an analyzer that is both simple-to-operate and maintain.

Users benefits from:
– Continuous measurement using ISE technology
– Automatic 2-point calibration
– Buffered measurement for maximum accuracy
– Low reagent consumption (up to 3 months continuous measurement before reagent replenishment)
– Temperature-controlled flowcell for measurement stability
– Intuitive software with full colour graphical display
– Data logging and graphical process trending
– Full audit trail capability
– Secure data archiving to SD Card


  • Measurement range
    0.050 to 1000 ppm NH3 (0.050 to 1000 mg/l)
  • Measurement Principle
    Gas-sensing ammonia probe
  • Measurement mode
  • Accuracy / maximum measured error
    ±5 % of reading or ±0.02 ppm for 0.05 to 500 ppm (whichever is the greater)
    ±7.5 % of reading for 500 to 1000 ppm
  • Repeatability
    ±2 % of reading or ±0.02 ppm (whichever is the greater)
  • Response time
    Normal operating mode: T90 typically 5 mins
    EcoMode: T90 typically <7.5 mins
  • Resolution
    0.001 ppm for 0 to 10 ppm
    0.01 ppm for 10 to 100 ppm
    0.1 ppm for 100 to 1000 ppm
  • Calibration
    2-point, automatic calibration
  • Measurement units
    mg/l, ppm, ppb, μg/l

Catalog and Questionnaire List



Data sheet – AAM631 | Aztec 600 ISE ammonia analyzer