Dehydrators are products that absorb excess water vapor inside packaging to keep humidity under control and prevent condensation.
These dehydrators must comply with specific standards such as the French Standard NF H 00320, the American Standard MIL D 3464 and the German Standard DIN 55473.
In addition, bags of dehydrating products such as silica gel or calcium chloride are used inside containers during transport to maintain a balance of vapor pressure and ambient relative humidity.
The French dehydrating unit (DU) is a measure of the moisture absorption capacity of these products, and a DU is capable of absorbing 100 g of water vapor at 40% relative humidity at a temperature of 20 ± 3°C. This unit is slightly larger than 16 American units and 16 German units.
It is important to control humidity in packaging warehouses to avoid corrosion problems that can lead to market rejections and economic losses. Relative humidity and temperature measuring equipment is available to help monitor and assess the risk of dew point condensation.
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