Systea S.p.A.

Analytical Technologies

Displaying items by tag: UV
Friday, 30 May 2014 00:00

Micromac ECO

On-line analyzer for COD/BOD/pH/TSS or COD/Color/pH/TSS

MICROMAC ECO is a microprocessor controlled on-line analyzer, specifically designed for automatic monitoring at the outlet of WWTPs.

  • Robust and Reliable
    Designed for industrial and environmental on-line applications, it ensures the highest level of robustness in the electronics, mechanics and hydraulics components. With a complete separation between electronics and hydraulics and a simple and robust hydraulics allows long term and reliable operations.
  • Easy to install
    The analyzer is delivered from factory only after a successful final test. It is provided ready for installation, with a spares set for start-up operations.
  • Automatic calibration
    The analyzer performs automatic calibration, the new calibration factor is checked and accepted if inside acceptance limits.
  • Measuring interval
    User selectable; between two measurements the analyzer remain in stand by mode, without reagents consumption.
  • Off scale reanalyze
    The analyzer identify off scale samples, and starts the analysis in dilution mode automatically.

Feature and benefits

Display Micromac ECO
  • 8" color touch screen
  • Fully automatic operation;
  • Long autonomy; low maintenance, low operating cost;
  • Nearly no reagents;
  • Easy operation; fully documented plug in analyzer, no special training is required;
  • Electronics and hydraulics completely separated;
  • Serial interface for PC or printer connection (optional)
  • Yearly maintenance.



Published in On-line analyzers
Monday, 03 January 2011 10:49

Micromac COD

On-line analyzers for COD monitoring
in water and wastewater


Three versions of COD on-line analyzers are available:

  • dichromate method
  • permanganate index method
  • UV direct reading method.

The dichromate method follows the international standard where in the sample, after filtration, Potassium Dichromate, Mercury (II) sulfate and Sulfuric acid with a proper catalyst are added; Mercury (II) sulfate concentration is adjusted to mask the expected Chloride amount.

The sample is then heated at 170° for 20 minutes or at 150° up to 2 hours (digestion time and digestion temperature can be adjusted depending on the matrix to digest completely all the substances that give a contribute to COD). After digestion the sample is cooled and the absorbance measured at 592 nm is proportional to a COD concentration.

The permanganate index is defined as the quantity of oxygen, expressed as mg/l, equivalent to the consumed permanganate when a water sample is treated with as solution of potassium permanganate in acid environment and at a temperature of 100°C for 10 minutes. The sample is mixed with diluted sulphuric acid, it is then heated at about 100°C, when the first addition of KMnO4 is performed: this first addition may be followed by others, depending on the measuring range. The digestion time in the standard configuration is set to 10 minutes but it can be selected depending on the matrix.

After digestion the sample is cooled and the decrease of the absorbance measured at 525 nm corresponds to the permanganate consumed by the organic substance.

The UV direct reading method is a more simple method where the COD is correlated to the direct light absorption of the water sample measured at 254 nm.



Published in On-line analyzers