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Celestron Dew Heater Ring - 9.25"
Celestron Dew Heater Ring - 9.25"
Celestron Dew Heater Ring - 9.25"
Celestron Dew Heater Ring - 9.25"
Celestron Dew Heater Ring - 9.25"

Celestron Dew Heater Ring - 9.25"

by Celestron
SKU CEL-94052
$81.95 - $81.95
$81.95
$81.95 - $81.95
$81.95
Price Match Policy!
  • Designed for Celestron 9.25" Schmidt-Cassegrain and EdgeHD telescopes
  • Delivers up to 24 watts of heating power directly to the corrector lens
  • Lightweight and durable aluminum ring construction weighs only 4.14 oz
  • Features a standard 12V DC barrel connector for power
  • Integrated thermistor for smart control with Celestron controllers
4 in stock
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Celestron Dew Heater Ring - 9.25"

    The Celestron Dew Heater Ring for 9.25" telescopes provides a permanent, efficient solution to dew, delivering up to 24 watts of power directly to your corrector plate. Constructed from rigid aluminum, this ring draws power from a standard 12V DC source and seamlessly replaces the original plastic retaining ring on your Schmidt-Cassegrain or EdgeHD optical tube.

    Direct Corrector Heating: 24 Watts for Maximum Efficiency

    Unlike conventional heater straps that warm the lens cell and hope the heat transfers inward, the Celestron Dew Heater Ring heats the corrector glass directly. This method provides the most efficient heat transfer possible, applying its full 24 watts of power where it matters most to prevent dew from ever forming. This direct contact ensures clear optics even on nights with heavy dew, using less power than less efficient methods.

    Permanent Fit for 9.25" SCT & EdgeHD Telescopes

    Engineered for a perfect fit, the aluminum Dew Heater Ring replaces the factory retaining ring on your 9.25" Celestron Schmidt-Cassegrain or EdgeHD telescope. This integrated design means it becomes a permanent part of your optical tube, so it's always ready when you need it. The rigid 4.14 oz frame not only supports the heating circuits but also securely holds the corrector lens, maintaining optical alignment. Thoughtful features include storage clips for the power and thermistor jacks and a cable management clip to prevent snags.

    Smart Control Ready with 12V DC Power and Thermistor

    Powering the ring is simple via a common 12V DC barrel connector. For optimal power management, the ring includes an integrated thermistor compatible with Celestron's SmartHeat Dew Controllers. When connected, the controller uses temperature and humidity data to apply the precise amount of power needed, dramatically extending battery life in the field. A 6" power jack extension cable is included for connecting to controllers or other power sources.

  • How does the 9.25" Dew Heater Ring install on my telescope?

    The Celestron Dew Heater Ring is designed to permanently replace the existing plastic retaining ring on the front of your 9.25" SCT or EdgeHD telescope. The installation process is straightforward and involves carefully removing the old ring and securing the new heater ring in its place, which then also holds your corrector lens.

    Will this Dew Heater Ring work with a third-party dew controller?

    Yes, the heating element can be powered by any controller that provides 12V DC through a compatible RCA-style plug (using the included extension cable). However, the integrated thermistor function is only compatible with Celestron SmartHeat Dew Controllers via its 2.5mm audio jack.

    What kind of power supply do I need for the Celestron 9.25" Dew Heater Ring?

    You need an external 12V DC power source with a 5.5mm/2.1mm, tip-positive barrel connector. This can be a portable battery pack like a Celestron PowerTank, a dedicated dew controller power port, or an AC adapter if you are observing from home.

    Is a dew shield still necessary with the 9.25" Dew Heater Ring?

    While not mandatory, using a dew shield is highly recommended. A dew shield reduces the rate of cooling on the corrector plate by blocking it from the open sky. This significantly decreases the amount of power the 24-watt heater ring needs to use to keep the glass clear, saving battery life.

    Can I leave the Dew Heater Ring on my 9.25" EdgeHD when I put the dust cover on?

    Yes. The ring is designed to live on the telescope permanently. It includes two integrated storage clips that securely hold the power and thermistor jacks, allowing the telescope's original dust cover to fit perfectly over the top.

    How much power does the Dew Heater Ring draw on my CPC 925?

    The ring has a maximum power draw of 24 watts. When used with a simple 12V DC source, it will run continuously at this power. When paired with a Celestron SmartHeat Dew Controller, the power draw will be variable and much lower on average, as the controller only provides enough energy to keep the corrector just above the dew point.

  • Compatibility 9.25" Schmidt-Cassegrain, EdgeHD
    Max Power 24 watts
    Power Jack 12V DC barrel connector, 5.5mm/2.1mm, tip positive
    Thermistor Jack 2.5mm audio jack
    Ring Construction Aluminum
    Inner Diameter 235mm (9.25")
    Outer Diameter 261.1mm (10.28")
    Weight 4.14 oz (117.5 g)
    Power Jack Extension Cable 6" long, 12V DC, 5.5mm/2.1mm barrel to male RCA, tip positive

    • Dew Heater Ring - 9.25"

      × 1

    • Cable Management Clip

      × 1

    • Power Jack Extension Cable

      × 1

    • Paper Installation Shield

      × 1

  • Celestron 2-Year Warranty