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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 - 7" Scope

Dew-Not Heater Strip - 7" Scope

by Dew-Not
SKU DN008
$51.00 - $51.00
$51.00
$51.00 - $51.00
$51.00
Price Match Policy!
  • Heater Element Length: 24"
  • Total Strip Length: 25.0" (63.5cm)
  • Designed For: 7" Telescope OTAs
  • Power Consumption: 11.8 W at 12V DC
  • Connection: Molded RCA Jack
4 in stock
Qualifies for FREE Shipping in CONUS on orders over $350.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Warranty

  • Dew-Not Heater Strip - 7" Scope

    The Dew-Not Heater Strip for 7" Scopes provides 11.8 W of consistent, dew-fighting power, drawing 0.98 A from a standard 12V DC source. This 25.0" strip wraps securely around 7" OTAs, utilizing a 24" thick-film heating element for even thermal distribution and burnout prevention.

    Thick-Film Heating: A 24" Element for Uniform Dew Prevention

    Unlike common resistance-wire heaters that can create damaging hot spots, this Dew-Not strip uses a 24" thick-film element. This advanced design distributes heat more evenly across its entire surface, gently warming your optics to just above the dew point without risk of localized overheating.

    Designed for 7" OTAs: 25" Strip Length and Insulated Construction

    With a total length of 25.0", this heater is sized specifically for the circumference of 7" telescope optical tubes. The exterior features a durable cloth cover with foam insulation to direct all the warmth inward toward your optics, while a full-length Velcro closure ensures a snug, secure fit that won't slip during an imaging session.

    12V DC Operation: 11.8W of Efficient Power

    Operating on a standard 12V DC supply, the strip draws a modest 0.98 A to produce 11.8 W of power, enough to keep dew at bay without rapid battery drain. It connects via a durable, molded RCA jack, making it compatible with virtually all commercially available dew heater controllers. Note that a separate dew controller is required to manage power output.

  • How do I know if the Dew-Not DN008 heater will fit my 7" Maksutov-Cassegrain?

    Yes, the Dew-Not DN008 is specifically designed for 7" OTAs. Its 25.0" length will wrap securely around the main tube of a 7" Maksutov-Cassegrain or other telescope of the same aperture. For absolute certainty, you can measure the circumference of your optical tube; it should be just under 25 inches.

    What is the difference between the 24" heater length and the 25.0" strip length on the Dew-Not DN008?

    The active heating element itself is 24" long. This element is housed within a slightly longer, 25.0" insulated fabric strip. This construction provides a small, non-heated tab at the end for the Velcro closure, ensuring a secure fit without putting stress on the heating element.

    What kind of power supply do I need for the Dew-Not 7" Heater Strip?

    You will need a dew heater controller and a 12V DC power source, such as a portable astronomy battery pack. The strip itself draws 0.98 A (consuming 11.8 W at full power) and connects to the controller via a standard RCA-style plug. The controller then connects to your 12V battery.

    Can I use the Dew-Not DN008 heater on my 8" SCT to view the Orion Nebula (M42)?

    No, the DN008 is too short for an 8" SCT. Attempting to stretch it could damage the strip, and it would not provide sufficient heat coverage. You would need a larger model designed for 8" telescopes to ensure a proper fit and effective dew prevention for observing targets like the Orion Nebula (M42).

    What makes the Dew-Not thick-film heater different from a standard wire heater?

    A thick-film heater, like the one in the Dew-Not DN008, has a large, flat heating surface that distributes warmth evenly. Standard resistance-wire heaters concentrate heat along a thin wire, which can lead to uneven heating and potential "hot spots." The thick-film design provides more efficient and safer dew prevention.

    Does the Dew-Not DN008 come with a controller?

    No, this is the heater strip only. It is designed to be used with a separate, compatible dew heater controller, which allows you to adjust the 11.8 W power output based on ambient temperature and humidity.

  • MPN DN008
    Heater Element Length 24"
    Fits Aperture 7" Telescopes
    Fits Model 7" OTAs
    Total Strip Length 25.0" (63.5cm)
    Voltage 12V DC
    Power Consumption 11.8 W
    Current Draw 0.98 A

    • Dew-Not Heater Strip for 7" Scopes

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  • Dew-Not Warranty