Solid-State Micro Dehumidifiers and Humidity Controllers for Enclosures and Cabinets

Advanced maintenance-free humidity control for OEM, industrial, and commercial applications

Rosahl

dehumidifiers

Humidity

Controllers

Installation

accessories

Drykeeper passive

dehumidifiers

Pro- Am 3D print

filamant drying

Maintenance-Free Humidity Control for Enclosures and Equipment

Controlling humidity inside enclosures and equipment is essential to protect both sensitive devices and valuable items. From electronics and optical systems to musical instruments, museum displays and stored materials, unmanaged moisture can lead to condensation, corrosion, distortion or long-term degradation.

Traditional approaches often add complexity, require ongoing maintenance, or struggle to maintain stable conditions over time.

We take a different approach: maintenance-free humidity control engineered specifically for enclosed spaces. This website provides clear, practical guidance on stabilising internal conditions, preventing condensation, and selecting the right solution using solid-state micro-dehumidifiers and long-life passive humidity buffers.

Whether you are designing new OEM equipment or protecting valuable contents, you will find proven methods, reliable technologies and straightforward selection tools that deliver consistent performance without ongoing servicing.

Protect your equipment from humidity damage

Our Solution: Solid-state dehumidifiers

Membrane dehumidifiers

Humidity inside enclosure and products can cause condensation, corrosion and equipment failures, Electronics, control panels, electro-optics and sensitive materials ave especially vulnerable to moisture which ccan reduce performance, reliability ans lifespan

Our solid-state Rosahl micro-dehumidifiers actively  remove moisture from sealed and semi-sealed enclosures from 250ml up to 8m³.

Unlike heated systems or desiccants they remove the moisture from the enclosuresfor long-term protection.

Benefits of Rosahl dehumidifiers

Versatile applications

    • Enclosures sizes of 250ml to 8m³
    • Vibration free, silent operation
    • High reliability with low energy use
    • Suitable for hard to access sites
    • Operates from -20° C to +60° C 
    • Clean trouble free operation
    • Maintenance free lifetime
    • Outdoor use (with protection)
    • Suitable for set-point control
    • Works at safe 3V DC voltage
    Image or Rosahl micro dehumidifiers for protecting capital equipment
    • Photonics, laser and optics
    • Lidar, radar and FLIR
    • CCTV and ANPR
    • Control panels and capital equipment
    • Telecoms and communications equipment
    • Medical and lab storage cabinets
    • Analytical and scientific equipment
    • Heritage, museum and display cabinets
    • Musical instruments and valuables
    • Memorabilia
    • 3D print filament drying
    Rosahl protects protect CCTV and IP cameras

    Which Rosahl is right for my application?

    Our technogy

    For different enclosure sizes as Alison's original..........

     

    Rosahl uses a solid polymer electrolyte membrane to transport moisture out of a sealed enclosure. When powered, water molecules are moved through the membrane and released externally as vapour.

    Moreover, Rosah dehumidifiers wil noth redhumidify and humidify and set point is availabe ehrn used with a controller

    Image of Rosahl's electrolytic transport mechanisom for dehumidifying sealed enclosures

    Supporting Products

    Humidity Controllers

    Uniquely the Rosahl solid-state membrane can operate as an enclosure dehumidifier or as a humidifier. By using two membranes and a Rositrol-RH2 Series hygrostat a balanced humidity may be set to allow accurate control to your chosen humidity.

    The hygrostat automatically keeps your enclosure at the humidity level you set. It constantly monitors the moisture in the enclosure and switches your membranes to humidify or dehumidify whenever adjustments are needed. Set your preferred humidity level (set-point) on the App and the system takes care of the rest, helping protect what you value.

    Installation Accessories

    New Rosahl mounting kits

    To support the installation of Rosahl membranes we offer a wide rand of accessories to aid and protect the installation of membranes, including:

    • Power supplies and power adapters
    • Moulded cases die installing membranes
    • Pre-installed membranes in cases
    • Internal mounting kits
    • Internal and external moulded cover plates
    • Environmental protection vents (VTS)

    Drykeeper Passive Dehumidifiers

    Drykeeper is a passive, long-life humidity control solution for sealed and unventilated enclosures.

    Drykeeper uses a maintenance-free polymer absorber with a typical service life of up to 10 years. The sheet buffers internal humidity by absorbing water vapour when relative humidity is high and releasing it when conditions dry, helping to stabilise enclosure humidity in the 50–60% RH range.

    By reducing the absolute humidity in the enclosure, Drykeeper lowers the dew point, preventing condensation on internal surfaces even as temperatures fall.