Installation Guide: M-1J1R Installation Kit

Installation Instructions M-1J1R-KIT

Overview

The Rosahl M series membranes are designed for mounting inside an enclosure to remove moisture. Installation requires a cutout in the enclosure over which the membrane sits to allow moisture to escape.

For small enclosures, it may be beneficial to mount the membrane dehumidifier externally. In these cases, the M-1J1R Installation Kit provides a mounting solution that reverses the moisture outflow direction.

Important: Simply reversing the polarity of the power to the membrane will not work and may damage the membrane. The special installation kit ensures correct functionality. When used with a USB-C power supply module, it offers a convenient, low-power dry storage solution.

The membrane kits are suitable for use with a wide range of sealed display and storage enclosures and cabinets to protect sensitive and delicate equipment or devices. Moreover, they are also suitable for applications such as Bambu Lab AMS or other 3D printer filament storage systems, converting them into an electric dehumidifier without needing desiccant.

Assembly & Mounting Instructions

  1. Mounting Cover Components

The mounting kit consists of three parts (see images).

  1. Inner fixture – Holds the membrane and USB-C power module.
  2. Outer cover – Secures components in place.
  3. Back plate (optional) – Provides extra stability for flexible enclosure walls.
  1. Marking & Drilling Holes
  1. Hold the inner fixture against the mounting location and mark the screw hole positions. It may help to hold it upside-down
  2. Consider drilling one fixing hole first, insert a bolt to hold the fixture in place, and then drill the remaining holes.
  3. Use a 3mm drill bit – the fixture has slightly larger holes to allow for minor alignment adjustments.
  4. Mark and cut out the membrane hole using one of these methods:
    • Dremel-style rotary tool with a cutting disk.
    • Step drill: Drill a round hole to the centre of the membrane area up to 20mm (the M-1J1R gasket is large enough to cover this cutout).
    • Manual method: Drill a row of 3mm holes around the membrane area, connect them using a small round file, and smooth the edges with a flat file. (See images for step-by-step guidance.)
  1. Installing the Components
  1. Routing the Power Cables:
    • Feed the cables through the concealed channel in the inner fixture.
  2. Installing the USB-C Power Supply:
    • The USB-C power module slides into its designated slot within the inner fixture.
  3. Installing the Membrane:
    • Before inserting the membrane, place the rubber sealing ring into the recess below the membrane. If necessary use a couple of tiny drops of superglue
    • Insert the membrane into the inner fixture.
    • Slide the outer cover over the fixture to secure the membrane.
  1. Final Mounting
  1. Position the assembled unit over the enclosure cutout.
  2. Use the original M-1J1R gasket between the installation kit and the enclosure wall and fix in position with  the nuts and bolts provided with the kit.
  3. If the enclosure wall is too flexible, add the back plate inside the enclosure to ensure a secure and airtight seal.

 

 

Parts List

  • M-1J1R membrane
  • M-1J1R-KIT mounting fixture (inner + outer cover)
  • USB-C power supply module
  • 90° flat connectors (for membrane terminals)
  • Rubber sealing ring
  • Back plate (optional)
  • Fixing screws

Notes

  • Ensure all connections are correctly soldered before final assembly.
  • Always use the provided sealing ring to prevent leaks.
  • Check that the gasket is compressed properly for an airtight fit.

For additional guidance, refer to the step-by-step images provided on the product page.