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June 24th: Store is closed for Quebec National Holiday. Orders placed that day will ship on June 25th.
ZWO Desiccant Tablets

ZWO Desiccant Tablets

by ZWO
SKU ZWO-Desicc
$19.00 - $19.00
$19.00
$19.00 - $19.00
$19.00
Price Match Policy!
  • Maintains a dew-free sensor chamber
  • Factory-original replacement for all ZWO cooled cameras
  • Includes four desiccant tablets
  • User-replaceable to restore camera performance
1 in stock
Worldwide Shipping
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • ZWO Desiccant Tablets for ASI Cooled Cameras

    This ZWO Desiccant Tablet replacement pack includes four tablets, designed as the factory-original solution to eliminate internal moisture in any ZWO ASI cooled camera. Backed by a 2-Year ZWO warranty, these tablets are the specific component required to keep your sensor chamber free of dew or frost. The linked 4.13 MB overview document shows the exact placement and replacement procedure for these essential maintenance items.

    Restore Dew-Free Performance in 4 Steps

    Internal dew or frost formation on your sensor's optical window is the primary sign that the original desiccant tablets are saturated. Replacing the four tablets inside the sensor chamber restores your camera's ability to combat moisture, eliminating the "frost rings" or hazy gradients that can ruin a sub-exposure. This is a routine maintenance task, not a defect, and is critical for consistent imaging, especially in high-humidity environments.

    Guaranteed Fit for All ASI Cooled Cameras

    These are the official ZWO replacement tablets, ensuring 100% compatibility and fit for every cooled ASI camera model. Using factory-specified desiccants means you don't have to worry about incorrect sizing, outgassing, or chemical composition that could harm sensitive sensor coatings. From the original ASI1600MM Cool to the latest full-frame models, this single pack contains the correct tablets for the job.

    • OEM Specification: Ensures the tablets have the correct porosity and moisture absorption capacity for the sealed chamber volume of ASI cameras.
    • Prevents Contamination: Avoids the risks associated with third-party desiccants that may not be rated for use near delicate optical surfaces.
    • Simple Installation: The replacement process is straightforward and can be completed in minutes with basic tools, as detailed in ZWO's documentation.

    ZWO OEM Tablets vs. Generic Alternatives

    While other desiccants exist, only the official ZWO tablets are guaranteed to fit the specific recessed slots within the ASI camera's sensor chamber. The primary limitation of any desiccant is its finite lifespan; it is a consumable item that must be replaced periodically to maintain a dry environment.

    • Generic Desiccants: May be improperly sized, leading to a poor seal or loose particles inside the optical train. Their absorption properties are not matched to ZWO's design, potentially leading to faster saturation.
    • ZWO Desiccant Tablets: Provide a confirmed fit and the specified moisture-absorbing lifespan intended for the camera's sealed environment. This is the only way to restore the camera to its original factory-dry condition.

  • How do I know if my ZWO ASI cooled camera needs new desiccant tablets?

    The most common sign is the appearance of dew, frost, or a hazy pattern on your images, especially on flat frames, after the sensor has reached its cooling setpoint. This indicates moisture is condensing on the inside of the sensor's optical window, and the original desiccant tablets are saturated and can no longer absorb moisture.

    Are these ZWO desiccant tablets compatible with my ASI294MC Pro camera?

    Yes. These desiccant tablets are the official ZWO replacements and are designed to fit all models of ZWO ASI cooled cameras, including the ASI294MC Pro, ASI1600MM Pro, ASI2600MC Pro, ASI6200MM Pro, and all others in the series.

    How many tablets are included in one pack of ZWO-DESICC?

    Each ZWO-DESICC package contains four (4) individual desiccant tablets. This is the exact number required to fully replace the existing tablets inside the sensor chamber of one ASI cooled camera.

    My ASI2600MC Pro is showing frost spots on my flat frames. Will these ZWO desiccant tablets fix it?

    Yes, almost certainly. Frost spots appearing on flat frames are the classic symptom of saturated desiccants. Replacing the old tablets with this new set will absorb the trapped moisture in the sensor chamber, directly solving the cause of the internal frost formation and restoring clean, artifact-free images.

    How often should I replace the desiccant tablets in my ASI cooled camera when imaging from a humid location?

    In humid environments (e.g., over 70% relative humidity), you may need to replace the tablets every 6-12 months. In drier, arid climates, they can last for several years. The best indicator is not a fixed schedule but the visual appearance of frost or dew on your sensor; once you see it, it's time for a replacement.

    Is it difficult to replace the ZWO desiccant tablets myself?

    No, the process is designed to be user-serviceable. It involves removing a few screws on the camera body to open the sensor chamber, carefully swapping the old tablets for the new ones, and re-sealing the chamber. ZWO provides detailed instructions in their camera manuals and online documentation.

  • SKU ZWO-DESICC
    MPN ZWO Desicc
    Compatibility All ZWO ASI Cooled Cameras
    Warranty ZWO - 2 Years

    • Overview of ASI Cooled Cameras (4.13 MB)

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  • ZWO 2-Year Limited Warranty