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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Dew-Not Heater Strip - 12" Scope

Dew-Not Heater Strip - 12" Scope

by Dew-Not
SKU DN013
$68.00 - $68.00
$68.00
$68.00 - $68.00
$68.00
Price Match Policy!
  • Fits 12" Telescope OTAs
  • 43.0" (109.2cm) Strip Length
  • 42" Active Heater Element Length
  • Power: 20.2 W at 12V DC
  • Current Draw: 1.68 A
1 in stock
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Dew-Not Heater Strip - 12" Scope

    The Dew-Not Heater Strip DN013 is engineered for 12" OTAs, delivering 20.2 W of consistent heat from a standard 12V DC source. This 43.0" strip contains a 42" long thick-film heating element that draws 1.68 A to keep your optics clear of condensation all night long. Its patented design provides even heat distribution, eliminating the hot spots common with inferior resistance-wire heaters.

    Thick Film Heating: 20.2W of Even Dew Prevention

    Unlike basic resistance wire heaters, this Dew-Not strip uses advanced thick-film technology where 66% of the surface area actively radiates heat. This design consumes 20.2 W (1.68 A at 12V) to gently warm your optics without creating localized hot spots that can degrade image quality. The result is a more efficient and reliable way to prevent dew, ensuring your observing or imaging session isn't cut short by changing conditions.

    Built for 12" OTAs: 43" Length and Secure Velcro Fit

    With a total length of 43.0 inches, the DN013 is sized specifically for the circumference of 12" telescope tubes. The durable cloth-covered strip features foam insulation on the outside to direct all heat inward toward your optics, maximizing efficiency. A robust Velcro closure ensures a snug, secure fit that won't slip, while the integrated 6-foot cord with a standard RCA jack plugs directly into most dew heater controllers.

  • What makes the Dew-Not DN013 different from cheaper resistance wire heaters?

    The key difference is the thick-film heating element. Cheaper heaters use a thin wire that can create hot spots and burn out over time. The Dew-Not heater uses a flat, wide element where 66% of the surface radiates heat, providing more even and reliable dew prevention without risk of damaging your equipment or distorting your view.

    What kind of controller do I need for the Dew-Not 12" heater?

    You will need a 12V DC dew heater controller with an RCA-style output port. The Dew-Not DN013 is designed to be compatible with industry-standard controllers from major brands. The controller allows you to adjust the power output based on ambient temperature and humidity.

    Will the 43" Dew-Not DN013 fit my 12" f/8 Dobsonian OTA?

    Yes, absolutely. The 43.0" length is designed to wrap around the approximately 42-inch circumference of a standard 12" optical tube, with enough overlap for the Velcro to secure it firmly. It's an ideal choice for keeping the primary mirror or upper cage optics of a large Dobsonian free from dew.

    How much power does the Dew-Not 12" heater draw from my field battery?

    At 100% power, the Dew-Not DN013 draws 1.68 Amps. When connected to a dew controller, the actual draw will be lower as the controller cycles the power. A typical deep-cycle battery (e.g., 35Ah) can run this strip for many hours, even alongside other equipment.

    Is the Dew-Not DN013 suitable for my 12" SCT's corrector plate while imaging the Andromeda Galaxy (M31)?

    Yes, this is a primary use case for this heater. A 12" SCT corrector is highly susceptible to dewing up. The 43.0" strip fits perfectly around the front cell of most 12" SCTs, and its 20.2 W output is more than sufficient to keep the corrector plate clear through a long imaging session, ensuring your exposures of M31 remain sharp and high-contrast.

    Is the heating element really 42" long if the strip is 43"?

    Yes, that is correct. The active heating element inside the strip is 42" long. The overall strip length is 43.0" to accommodate the cloth and Velcro construction at the ends, ensuring a secure and fully insulated fit around the telescope.

  • MPN DN013
    Fits Telescope Aperture 12"
    Fits Telescope Model 12" OTAs
    Total Strip Length 43.0" (109.2cm)
    Heater Element Length 42"
    Voltage 12V DC
    Power 20.2 W
    Current Draw 1.68 A

    • Dew-Not Heater Strip for 12" Scopes

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  • Dew-Not Warranty