The ABB Aztec 600 aluminium, iron and manganese colourimetric monitors use an LED and detector to measure the passage of light through a sample. They can measure up to six samples per hour.

The analysers’ measurements are taken before and after colour reagents are added to compensate for background colour and turbidity. These measurements are compared against the calibrated values to calculate the sample being measured. Automatic two-point calibration enables the user to verify the analyser performance against standards of a known concentration. To maximize the measuring range, the Aztec 600 features automatic sample dilution. The analyzers are available in single or multi-stream configurations, and users can operate one device to monitor up to three streams sequentially with current loop, Ethernet or Profibus outputs.