Plastics can absorb varying amounts of moisture during storage. Depending on the plastic used, the degree of moisture must be measured before production and reduced by drying if necessary.

If a sample is heated by means of infrared radiation when measuring residual moisture, this is referred to as infrared residual moisture measurement.
The measuring principle is as follows:
A sample is heated by infrared rays. This evaporates the moisture from the plastic. By checking the weight with a precision scale built into the measuring device, the difference in weight before and after drying is determined.
This result corresponds to the moisture content in %.

Infrared residual moisture measurement in Plastic Industry by GWT


Quality assurance: Infrared residual moisture measuring device in use

Related topics:

Quality control



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This glossary of plastic industry is provided by PLEXPERT Canada Inc.
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