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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 - 9" Scope

Dew-Not Heater Strip - 9" Scope

by Dew-Not
SKU DN010
$59.00 - $59.00
$59.00
$59.00 - $59.00
$59.00
Price Match Policy!
  • Fits 9" Schmidt-Cassegrain and other OTAs
  • 33" (83.8cm) Strip Length
  • 32" Active Heater Element Length
  • 15.5W Power Draw at 12V DC
  • Thick-Film Heater Technology for Even Heat
5 in stock
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Dew-Not Heater Strip for 9" Telescopes

    The Dew-Not DN010 Heater Strip delivers 15.5 watts of consistent power to keep your 9" telescope optics clear of dew. Its 33.0" (83.8cm) overall length contains a 32" thick-film heating element, operating efficiently on 12V DC at just 1.30 amps. This American-made heater provides reliable, full-coverage protection for a wide range of 9" OTAs.

    Advanced Thick-Film Heating: 15.5W of Even Power

    Unlike traditional wire-based heaters, this Dew-Not strip uses patented thick-film technology. This design dedicates 66% of its surface to emitting heat, drawing 15.5W of power to gently and uniformly warm your optical tube. This process prevents the formation of dew without creating localized hot spots that could affect image stability.

    Designed for 9" Telescopes: 33" Length and Insulated Construction

    With a total length of 33.0 inches, the DN010 strip is sized specifically for 9" telescope tubes, ensuring a secure fit without excess overlap. The exterior is cloth-covered with foam insulation to direct all heat inward toward the telescope, maximizing efficiency. A durable Velcro closure allows for quick installation and removal, while the 6-foot cord with a molded RCA jack connects to most standard 12V DC dew heater controllers.

    Thick-Film vs. Wire Heaters: Why 66% Surface Area Prevents Burnouts

    The primary advantage of the Dew-Not's thick-film heater is reliability. Resistance wire heaters concentrate all their heat along a thin, delicate wire, making them prone to failure and burnouts. By distributing the heating load over 66% of the strip's surface area, the Dew-Not system eliminates these points of failure, ensuring consistent operation for years.

    • Even Heat Distribution: The broad heating surface prevents hot spots and ensures the entire circumference of your optical tube is warmed evenly.
    • Enhanced Durability: The absence of a single, fragile resistance wire means the strip can withstand repeated use without the risk of internal breaks.
    • Maximum Efficiency: The insulated backing ensures the 15.5W of power is directed into your telescope, not wasted into the night air.

  • How do I know the Dew-Not DN010 will fit my 9" telescope?

    The Dew-Not DN010 is specifically designed for 9" aperture telescopes. With a total strip length of 33.0", it provides the correct circumference to wrap securely around the optical tube of most 9" Schmidt-Cassegrains, Maksutovs, and refractors.

    What kind of power controller do I need for the Dew-Not 9" heater strip?

    You will need a standard dew heater controller that provides 12V DC power and has outputs for RCA-style plugs. The DN010 draws a maximum of 1.30 amps, which is compatible with virtually all commercially available dew control systems.

    Will the Dew-Not DN010 cause hot spots or damage my telescope's finish?

    No. The heater uses thick-film technology that distributes heat evenly across 66% of its surface area, a significant improvement over resistance wires. This design produces gentle, uniform warmth at 15.5 watts, which is highly effective at preventing dew but is not concentrated enough to damage your telescope's finish or optics.

    I have a 9.25" SCT; will this 9" Dew-Not heater strip still work effectively?

    Yes, the 33.0" length of this strip is generally sufficient to wrap around a 9.25" SCT, though there will be a small gap where the ends meet. The even heating from the 32" element is more than capable of preventing dew formation on the corrector plate, even with this minor gap.

    How much power does the Dew-Not DN010 draw from a field battery on my Celestron C9.25?

    The Dew-Not DN010 has a fixed power consumption. When connected to a 12V DC source, it will draw 15.5 watts of power, which equates to a current of 1.30 amps. During a 5-hour imaging session, this would consume approximately 6.5 amp-hours (Ah) from your battery if run at 100% power, though most controllers will cycle the power, reducing overall consumption.

    What is the difference between the 33.0" strip length and the 32" heater element length on the Dew-Not DN010?

    The 33.0" (83.8cm) measurement is the total physical length of the fabric strip, including the Velcro ends. The 32" measurement refers to the length of the active heating element embedded within the strip. This design leaves a small, unheated section at the ends for a secure and cool-to-the-touch closure.

  • MPN DN010
    Fits Telescope Aperture 9"
    Fits Telescope Model 9" OTAs
    Total Strip Length 33.0" (83.8cm)
    Heater Element Length 32"
    Voltage 12V DC
    Power 15.5 W
    Current 1.30 A

    • Dew-Not Heater Strip for 9" Telescopes

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  • Dew-Not Warranty