Humidity control sheet to prevent condensation
Prevents condensation for a long period without using electricity, eliminating the need for maintenance inspections
Humidity Control Sheet is a product that has received NETIS VE (Network Information and Development) certification for its effectiveness in social infrastructure and public works projects.
A special moisture-regulating sheet that "breathes" protects electrical equipment and facilities from condensation-related problems such as malfunctions.
Even though you have taken waterproof measures, your equipment still breaks down... Could condensation be the cause?

If the electrical equipment has a waterproof structure, it protects the electrical equipment from water and dust. However, in many cases, the high humidity and dew condensation that occur when the air inside the equipment cools cannot be prevented, resulting in failure. Equipment that plays a particularly important role, once a problem occurs, has a huge impact and damages credit, and daily maintenance and preventive maintenance cannot be neglected.
The image below shows an example of condensation damage. Condensation has formed inside a sealed switchboard (left). As a result, corrosion occurs on the metal parts inside the switchboard (center and right), which can lead to equipment failure, malfunction, and even electrical leakage.

The solution is the anti-condensation sheet "Humidity Control Sheet"!
NTT-AT 's anti-condensation sheet "Humidity Control Sheet" is a special sheet *1 with excellent humidity control properties that prevents condensation and can be used for a long time, enabling smart maintenance that reduces maintenance costs. Furthermore, it is an ecological product that is friendly to the environment because it does not use electricity.
*1: A product with higher moisture absorption and desorption capabilities than silica gel, which has passed long-term reliability tests for installation in communications equipment.



Junction box: Dustproof / waterproof structure (IP55)
Application Examples
Humidity control sheet to prevent condensation You can see an example of the application of the
Three reasons why we recommend "Humidity Control Sheet"
Shut out condensation with its amazing humidity control function!
It absorbs moisture quickly when the humidity rises, just like breathing, and releases moisture quickly when the humidity drops, suppressing fluctuations in humidity and preventing condensation. The anti-condensation sheet "Humidity Control Sheet" is a product that complies with the RoHS Directive.
In our outdoor tests, the humidity inside the box without the anti-condensation sheet "Humidity Control Sheet" (blue) changes according to the outside air humidity (green), while the inside of the box with the anti-condensation sheet "Humidity Control Sheet" Humidity (red) always maintains a certain range of humidity.

Humidity measurement test of anti-condensation sheet "Humidity Control Sheet"
【Measurement condition】
Test box volume: 13.9 liters (with a φ5 mm vent on the bottom)
Condensation prevention sheet "Humidity Control Sheet" (postcard size) installed on the lid
Measurement location: Outdoors in Tokyo
Measurement period: Excerpt from 2 weeks

Long life and maintenance-free
Humidity Control Sheet wicks away moisture without the need for high temperatures or sun drying to regenerate its wicking ability. Therefore, it responds to daily humidity fluctuations. Performance is maintained for a long period *2 by repeatedly performing moisture absorption and desorption. In addition, since it is an ecological product that does not require electricity and does not require maintenance after installation, it reduces management effort and costs.
* 2: A communication infrastructure company with a track record of maintaining performance for about 10 years.
(The usable period varies depending on the structure of the enclosure to be installed and the environmental conditions.)
Versatility regardless of installation location
The anti-condensation sheet "Humidity Control Sheet" does not require electricity and is thin and light, so it can be easily installed in small spaces or on curved surfaces. We offer 4 different sizes, from business card size to small and large, according to the volume of the box to be constructed.

specification
Size lineup and installation examples

| Item | Dimensions (mm) | Mass (g) | Applicable volume (L)/sheet * |
|---|---|---|---|
| Humidity Control Sheet L | 560×230×3 | 130 | 400 |
| Humidity Control Sheet M | 370×150×3 | 50 | 150 |
| Humidity Control Sheet postcard size | 100×148×1 | 10 | 25 |
| Humidity Control Sheet business card size | 55×91×1 | 3 | 7 |
The applicable volume varies depending on the structure of the enclosure to be installed and the installation environment. If you would like to calculate the size and number of Humidity Control Sheet, please feel free to contact us from the "Inquiry Form" at the bottom of the page.

Cost comparison with other companies' products and implementation effects
Cost comparison of other methods for preventing condensation

[Precautions for use]
If there is a risk of water ingress in the box on which this product is installed, take preventive measures before using it.
The applicable volume is a guideline for use in a closed space. It depends on the environmental conditions.
This product does not guarantee the failure prevention of equipment.