New COD-Online-Analyser in the Forefront in Terms of Maintenance

GIMAT (Germany), a manufacturer of a wide range of measuring instruments for continuous water and waste water monitoring, recently presented the new “COD-LAB”. This online analyser is the completely revised version of successful analysers for the online determination of the chemical oxygen demand (COD).

Measuring principle of the COD-Lab

The COD-LAB adds hydrogen peroxide (H2O2) to the water sample. The reagent H2O2 forms highly reactive radicals in the UV-reactor which enable rapid oxidation of the sample. The reagent is added in excess and ‘unused’ radicals react to oxygen. The new COD-LAB series of analysers measure the dissolved oxygen (DO) with a luminescence oxygen probe. During analysis the reagent pump is regulated towards a set DO value. The COD-LAB then determines the COD content in the sample according to the reagent pump speed.

Advantages of the COD-LAB

With a sufficient calibration interval of one year the DO probe takes long-term stability to extremes, reducing operating costs tremendously. Low consumption of reagent and ease of maintenance are equally impressive. Thanks to a required maintenance time of typically less than half an hour per month, GIMAT’s COD-LAB analyser is top in terms of maintenance.