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Home Accessories Celestron Accessories Celestron 9.25 Inch Dew Heater Ring
The Celestron Dew Heater Ring is the ideal dew prevention solution for your Celestron 925 telescope. This must-have accessory will improve your observing or imaging nights year-round. The Dew Heater Ring permanently mounts to your 925 inch Celestron Schmidt-Cassegrain, EdgeHD, and RASA optical tube, replacing your retaining ring, so you'll never be caught without it. The installation process is quick and easy (follow the manual for instructions).Compatible with Dew ControllersThe Celestron Dew Ring comes with the standard RCA type lead that works with standard Dew controllers from other manufacturers, simply attach the lead from the ring to your existing dew controller for full control.How it worksThe Dew Heater Ring replaces the plastic retaining ring on your Schmidt corrector lens for efficient heating across the lens. The ring is constructed of lightweight, durable aluminum. Its rigid frame supports the cable circuity and the telescope's Schmidt corrector lens. Unlike other heating bands or strips that inefficiently heat the lens cell to warm the glass, the Celestron Dew Heater Ring heats the corrector glass directly, providing the most efficient transfer of heat to prevent dew formation. Simply plug the ring into an external 12V DC power source for consistent, continuous heat that will prevent dew from forming even under heavy dew conditions. The Dew Heater Ring features two storage clips to keep the power and thermistor jacks secure when not in use while accommodating the telescope's dust cover.Compatability9.25 inch Celestron Schmidt-Cassegrain, EdgeHD, and RASA optical tubes only. The Dew Heater Ring also comes with a cable management clip that connects to the telescope's front cell. Corral the power and thermistor jack to prevent them from dangling and reduce unwanted pulls on the cable connection to the rings.The Dew Heater Ring comes withDew Heater Ring Cable management clip Power jack extension cable Paper installation shieldEnhance your setupTo achieve the highest level of dew prevention while maximizing power efficiency, we strongly recommend pairing the Dew Heater Ring with a Smart DewHeater Controller (sold separately). The controller uses the ring's built-in thermistor and its internal environmental sensor to provide just the right amount of heat to the corrector to prevent dew based upon the ambient temperature, ambient humidity, and temperature of the Schmidt corrector, which can dramatically reduce the rings power draw, greatly increasing battery life. The ring also includes an extension cable for connecting the ring directly to one of the controllers heater output ports, or to a third-party controllers heater output port. (Note: the rings integrated thermistor is only compatible with the Celestron Smart DewHeater Controllers).We also recommend adding a dew shield to your setup. While not mandatory, a shield will cut down on the amount of power the Dew Heater Ring needs to keep the optics clear.
Great Product Just the thing I needed, eliminates all the need for messing about with heater tapes. I intend to get the power distribution unit that slots on the front of the telescope to keep everything neat and tidy. As always great service from Harrison Telescope and rapid delivery! (18/02/2024) Ian - Boston, Lincs
dew heater ring. Good thing this. excelent service from Harrisons. Ordered pm Tues. delivered am Wed. From Scotland to Worcestershire. Can't ask for better. (30/01/2023) Edwin Cross - Wotrcestershire
Great service. Excellent product The Celestron Dew Heater ring is a neat anti dew solution for Celestron SCT's. Easy to fit. Great response from Harrison Telescopes to my initial stock enquiry and fast fulfillment of my resulting order. (20/11/2022) Nigel Goodman - South East Scotland
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