The reliable control of several critical parameters is required in many industrial processes. Also environmental regulations become a more and more important issue in waste water treatment and discharge. For a large number of inorganic as well as organic substances discharge limits are introduced and enforced by environmental authorities. To be able to satisfy the growing demand for reliable automatic analytical instruments we developed the Process Colorimetric Analyser (PCA)! The PCA is designed as a very flexible instrument that can be customized easily for almost any colorimetric or photometric analysis.
Since online instruments are performing their job 24/7 they have to be very robust. But it´s not only the robustness of the hardware! The analytical method should be robust as well against changes in the sample matrix. Colour, turbidity, temperature variations and chemical interferences may have an important impact on the measurement results. Also ambient conditions (dust, dirt, moisture, temperature etc.) should be taken into account. Therefore, each instrument is carefully designed in order to get a maximum in reliability and robustness which means a maximum in environmental protection.
Many reactions are temperature dependant therefore sample and air temperature are measured and the temperature influence is taken into account automatically.
Since any photometric measurement is affected by turbidity measures have to be taken to overcome this problem.
One possibility is to use a sophisticated filtration system which means additional investment and maintenance.
The PCA offers the possibility to compensate turbidity effects! There are two options depending on the application: