The current AQUATRAC product range symbolizes state of the art, together with the Brabender Messtechnik attributes robustness, suitability for everyday industrial use and outstanding service. Here we explain our measuring methods in detail.
Measuring residual moisture with water-selective dew point measurement
Dew point measurement - measurement sequence
The water is extracted from the sample particularly effectively and quickly by means of negative pressure and increased temperatures. The vacuum not only creates a high concentration gradient between the sample and the measuring chamber, which ensures that the water contained in the sample evaporates completely from the material. It also ensures that the water from the sample cannot deposit on the walls of the instrument. The interior of the AQUATRAC station is made of selected hydrophobic, i.e. water-repellent, materials. The water vapour desorption rates are known and are taken into account in the evaluation of the measurement. At the same time, the vacuum increases the accuracy of the analysis, as the saturation vapour pressure and the dew point temperature are exponentially linked.
Measuring residual moisture with the calcium hydride method
Calciumhydrid-measrurement - measurement sequence
Calcium hydride method - Reagent
Calcium hydride in granular form is used as water-specific reagent. It is non-toxic and environmentally friendly, so that no costly disposal is necessary. The reagent is filled into the reagent insert in the AQUATRAC-V with the aid of a metering spoon. Contrary to conventional handling, only approx. 0.3 g of calcium hydride is now added for each measurement and replaced during the next measurement. This makes using the AQUATRAC-V even more intuitive. In addition, the amount of hydrogen produced is guaranteed to be minimal for each measurement.