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Drying chambers are used whenever a particularly low level of humidity is required, whether it is for storing food or dehumidifying test objects. Alongside drying and storage, modern drying chambers also enable more complex applications, such as simulating aging processes and carrying out general material testing.
Whereas conventional units generally only allow you to adjust the temperature – in a similar way to a traditional electric oven – drying chambers also offer active humidity regulation. This makes it possible, for example, to dehumidify objects even at an ambient temperature of +5°C, which is a crucial advantage in the case of electronic components in particular. he temperature range of drying chambers is therefore generally between an ambient temperature of +5°C as the lower limit and around 300°C as the upper limit. In fact, there are already units which can go beyond that and enable temperatures below 0°C.
The sizes of drying chambers vary significantly between applications. The smallest units hold around 30 liters while the largest can hold several hundred liters. For even larger applications, for example in the field of vehicle construction, facilities known as dry rooms are used.
The basic heating technology of a drying chamber largely corresponds to that of an electric oven. However, drying processes that work exclusively by means of high temperatures also result in some unwanted side effects. Electronic components, for example, are exposed to enormous thermal stress during heat drying and lose some of their conductivity as a result. In order to prevent such effects, drying processes that also work at lower temperatures are used.
Elevated temperatures can be used to test the durability of materials. In the case of cables, for example, shrinkage occurs over the years due to drying processes. A longer period of use can be simulated in a drying chamber. This makes it possible to test the material under realistic conditions. In this way, excessive shrinkage, cracks, or evaporations can be detected and prevented in advance. A very similar area of application is that of thermoplastic composite testing.
When buying your drying chamber, the most important thing to bear in mind is the recovery time after the door is opened. This is governed by a specific standard in the context of standardized material testing.
In order to check the reference values, the door of the drying chamber is opened for 30 seconds at the highest test temperature once the steady state has been reached. The temperature is then measured in the center of the usable space until it falls to the corresponding value. These values are regulated in DIN 12880:2007-05. The time it takes to reach the specified limit deviation is determined.
Do you have any questions about the functionality and applications of drying chambers or would you like to learn about the specifications of our units?