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Precautions for Use

Japanese English

To prevent the early decrease in performance of the dehumidifying element

  • 1. Do not use silicon-based sealing materials to improve the airtightness of the container.

    Silicon-based sealing materials generate oxime gas and siloxane gas during hardening.

    As a result, performance of the dehumidifying element decreases in a short term.

    [Recommended products] : modified silicon caulk (Konishi)

  • 2. If you use an element with a rubber packing or a similar material that contains an antioxidant,

    crystal materials may occur on the surface of an element. As a result, performance of the dehumidifying

    element may decrease. In addition, if you use a silicon rubber, you need to treat a packing with heat

    (150 deg C / 6 hours) to prevent early decrease in performance of the dehumidifying element.


  • 3. Do not use an element with vapor phase corrosion inhibitor or insect repellent. Do not use an element

    in a place having high density of organic gas. Performance of the dehumidifying element decreases

    in a short term.

Precautions in the use for the storage cabinet.
(Regarding the problems that the dehumidifying element has an influence on goods indirectly)

  • 1. When you use the dehumidifying element to dehumidify into the storage cabinet, do not store volatile

    rust preventive or things that organic gas volatilizes. The volatile gas which is released from goods

    reacted at a membrane's anode and new harmful gas is produced.

    As a result, not only it causes decrease in performance of the dehumidifying element, but also it

    might adversely affect on goods in the storage cabinet. We cannot guarantee even if harm occurs

    to the stored valuables under the influence of new produced gas.

    Please evaluate enough when you use the dehumidifying element for the storage cabinet.


  • 2. The maker who produces and sells storage cabinet equipped with our dehumidifying element should

    explain that enough for end users using the storage cabinet.



  • <Notice>

    A list of prohibited substances and recommended materials on the use of Rosahl,

    please refer to here.

Regarding the dehumidifying element

  • 1. Attach a protective cover as needed not to touch the dehumidifying / humidifying surface of an element

    with a hand and an object.


  • 2. Confirm the dehumidifying / humidifying surface of an element not to get a wrong surface before

    installation. Attaching an element by mistake will adversely affect the things in the container.


  • 3. Keep strictly the following about power supply to an element.

    (1) Do not reverse the polarity. Confirm a polarity indication of an element. Humidification is reversed

    to dehumidification when you get a wrong polarity, which may result in an adverse effect on the

    things in the container. It causes a chemical reaction in a porous electrode of cathode side and

    it causes the trouble of an element.

    (2) A dehumidifying element usually has a big rush current when the power is turned on.

    Therefore, we recommend the following power supply.

    (3) Use a dedicated power supply for each dehumidifying element. When multiple dehumidifying

    elements are connected in series or parallel, the trouble of one element may cause all other

    elements to be disabled.

    (4) The water vapor permeates the membrane of an element. So outside water vapor is returned

    to the container when you switch off a power supply and the humidity is restored.


  • Recommended power supply specifications
    Type Name PD2/PD3
    PD4/PD5
    RD3/RD4
    RS1/RS2
    M−1J1R M−2J1R M−3M1R
    M−3J1R
    MDL−3
    M−5J1R
    MDL−5
    M−7J1R
    MDL−7
    M−10J1R
    Rated output voltage DC 3V
    Rated output current 0.5A 1A 1.5A 2A 3A 5A 10A
    Overcurrent protection function *Note Required
    Overvoltage protection function Required
    Output voltage variation 0.1V or less
    Ripple noise 0.2V or less
    Others In accordance with the specifications of commercially available power supply
  • Note: Use a constant or fold-back current limiting about overcurrent protection function.

    You cannot use the power supply of the Hiccup mode because the voltage more than 2V is

    necessary for an element when an overcurrent protection function worked. Also an

    element may not work correctly depending on a characteristic of fold-back current limiting.


  • 4. A container must be an airtightness container. If a container has low airtightness and

    moisture-permeable material, the results may not be what you expected.


  • 5. Attach an element in the center of the inner side surface of a container with a packing while keeping

    the airtightness of a container. Do not attach it on a top or bottom surface.


  • 6. Do not expose the element part to water. When using outdoors, be sure to attach the cover to protect

    an airtightness of a container. Do not attach it on a top or bottom surface.


  • 7. Attach a moisture-permeable sheet to an element to protect it in the place with much dust or oil mists.

    [Recommended products] : Vent Filter TEMISH S-NTF2131A-S06 (Nitto)


  • 8. Keep a moisture discharging hole a good state of the ventilation.

  • 9. Do not do remodeling. An element may break down.

Regarding the dehumidifier

  • 1. A container must be an airtightness container. If a container has low airtightness and

    moisture-permeable material, the results may not be what you expected.


  • 2. Attach an element in the center of the inner side surface of a container. Do not attach it on a top

    or bottom surface.


  • 3. Do not expose the moisture discharging hole to water. When using outdoors, be sure to attach the

    cover to protect an element from water or insects.


  • 4. Attach a moisture-permeable sheet to an element to protect it in the place with much dust or oil mists.

    [Recommended products] : Vent Filter TEMISH S-NTF2131A-S06 (Nitto)


  • 5. Keep a moisture discharging hole a good state of the ventilation.

  • 6. Do not do remodeling. An element may break down.

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