FiberSource: Active-S Humidity Control Sheets for Maintenance-Free Humidity Control in Sealed Enclosures
FiberSource, a leading manufacturer of fiber optic and enclosure solutions, is proud to announce the latest advancements and proven field success of its Active-S Humidity Control Sheets (HCS). Originally developed to protect sensitive telecommunications equipment in demanding outdoor environments, Active-S HCS are now relied upon in a growing range of industries requiring dependable protection from condensation and excess moisture in electrical and electronic enclosures.
Unlike traditional solutions such as desiccants, dehumidifiers, heaters, and complex electromechanical devices, Active-S HCS provide an active, no-maintenance approach to humidity control. Each sheet is crafted from a sophisticated macromolecule polymer, a super-absorbent “breathing” material that actively absorbs and releases moisture, stabilizing relative humidity inside enclosures at or below 65%. This active exchange ensures optimal protection for sensitive equipment, without the need for power sources, moving parts, or frequent maintenance cycles. With decades of field testing in harsh climates—including outdoor deployments in metropolitan Tokyo, the Active-S solution suppresses condensation, reduces corrosion risk, and mitigates dangerous short circuits, extending equipment life and reliability.
The versatility of Active-S HCS now extends to a wide range of applications, including Departments of Transportation, marine and rail infrastructure, traffic controls, control panels, drones and ground stations, EV charging stations, industrial sensors, and food & beverage equipment. The flexible sheets easily conform to tight, hard-to-reach, and curved surfaces, installing effortlessly with double-sided tape, Velcro, or magnetic mounts.
“Active-S Humidity Control Sheets have established a flawless record for more than a decade in the field, with over 1.6 million units installed worldwide,” said Brian DiMarco, Vice President at FiberSource. “Top contractors, especially in the telecommunications sector, have endorsed Active-S for its unique, maintenance-free performance in the harshest real-world applications.”
With four standard sheet sizes and simple size selection guidelines, Active-S HCS fit any enclosure without consuming valuable internal space. Sizing and mounting recommendations help ensure optimal performance in both compact enclosures and large cabinets.
Active-S offers the lowest installation and lifetime applied cost in the industry. Unlike silica-gel desiccants that require frequent replacement, or bulky powered devices that raise installation and service costs, Active-S HCS operate entirely maintenance-free for years, reducing both upfront and ongoing labor. Active-S products are also available through DigiKey.
More information about Active-S Humidity Control Sheets from FiberSource
