ABB launched its Aztec 600 product range of online analytical analyzers for potable water treatment. Built on ABB”s new analytical instrument platform, the ABB Aztec 600 Aluminum, Iron and Manganese colorimetric monitors offer enhanced accuracy with simple operation and maintenance for potable water treatment applications. The analyzers use an LED and detector to measure the passage of light through a sample. A single controlled piston pump provides all the sample and reagent fluid handling for measurement, mixing and disposal. Measurements are taken before and after color reagents are added to compensate for background color and turbidity. These measurements are compared against the calibrated values to calculate the sample being measured. Automatic two-point calibration enables operators to verify analyzer performance against standards of a known concentration. The Aztec 600 Iron, Aluminum and Manganese analyzers can measure up to six samples per hour. To maximize the measuring range, the Aztec 600 features automatic sample dilution. This function allows the instrument to be set to automatically adjust to monitor higher levels of samples by using deionized water to dilute the sample. The analyzers are available in single or multi-stream configurations, enabling operators to use just one device to monitor up to three streams sequentially all with current loop, Ethernet or Profibus outputs.