Key FeaturesDetection of Residual Water in Solids The HydroTracer type FMX is a moisture analyzer designed for low water contents in solids. The precision of the method combined with high sample weights allows the determination of very low water contents with an accuracy of a few ppm. A great variety of powders, granules and films can be tested. The HydroTracer is used primarily for testing the residual moisture of plastics. The absolute water content of the sample material is provided by a chemical method - not by using the weight loss during heating, a method which only gives a prognosis of the relative moisture content. A calibration is not necessary before the measurement. The compact design and the easy operation allow the use in the production site. Even untrained staff members are able to handle the HydroTracer without problems. The robustness and the low weight recommends the device for mobile use, e.g. for acceptance tests of dryers or for intake inspections. Principle of Operation The sample material is weighed and filled into the sample tray. The sample tray itself is part of an reactor integrated within the Hydrotracer. A heater warms the sample to a temperature chosen by the operator. The heat forces the water to evaporate. The gaseous water reacts with the powdery reagent in a cooled area. Water is transformed into hydrogen. The concentration of hydrogen within the reactor atmosphere is a measure of the water content within the reactor. A gas sensor detects the hydrogen concentration. The moisture of the ambient air , which comes into the reactor at the beginning of the measurement, is detected by separate sensors and considered in the calculation of the water content of the sample. This unique method allows the precise analysis of the water content of the test material.
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