Huber Scientific manufactures specialised test setups, especially for high temperature measurements of catalytically active and conductive materials.

Such materials are often oxides, whose oxygen content changes with the oxygen partial pressure in the environment and the temperature.

The exact determination of the oxygen content as a function of temperature and oxygen partial pressure is important in research. The most accurate method of measuring changes in oxygen content is coulumetric titration. In this method of measurement, the material under investigation is placed in a gas-tight electrochemical cell and the amount of oxygen that has escaped is measured electrochemically by means of current flow through two electrodes. Alternatively, the cell can also be used as an oxygen sensor by filling it with an iron-iron oxide mixture.

Currently, measuring cells for coulumetric titration are expensive to construct and complex to handle. Moreover, these are proprietary developments of universities and are not commercially available. By miniaturising the components, however, these cells can be easily manufactured and used, which enables commercial use.

In addition to optimising the design, however, it is also necessary to verify the electrochemical properties and optimise the electrode production in order to ensure reliable functioning.

Furthermore, such a cell can also be used for oxygen partial pressure measurement by filling it with a well known metal/oxide mixture (e.g. Fe/FeO).