Electric Micro-Dehumidifier Modules

Operation

Rosahl dehumidifiers are based on a solid-state polymer membrane. When supplied with a 3V DC voltage, moisture on one side is being decomposed into Hydrogen ions and Oxygen, the Hydrogen ions pass the membrane and recombine with air Oxygen to moisture again on the other side and get discharged.
The Rosahl dehumidifiers are compact, work fully mainenance-free and the power consumption is very low.

Applications

Depending on size and maximum air capacity the application range from enclosures for sensitve electronics, over optical instruments, spectroscopes, LED lighting to glas cabinets in museums.

Storage of 3D-Print Filament Spools

Beyond the above applications, some Rosahl dehumidifiers are suitable for dry storage of filament spools of various materials for 3D printing. We inspected several storage boxes with regards to their suitability (sealing, capacitiy, etc.) and selected three Rosahl dehumidifiers for our product range, which turned out well suited. The usually required deccicant (Silica gel), which has to be regenerated periodically, is no longer needed.

We achieved a final humidity in the selected combinations of dehumidifiers and storage boxes of max. 15% rH in continous operation. Filament spools should be properly dried before (in e.g., filament dryers or oven), otherwise it can take considerably longer to reach the final jumidity.

To simplify mounting the Rosahl dehumidifiers into the storage boxes we designed suitable 3d-printable frames/covers. Those are linked on the product pages and can be downloaded for free on Printables.com.