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Until May 2nd, 2025, orders under US$800 will not incur any duties or taxes upon delivery. Please note that orders under US$800 crossing the Canada-USA border after this date will be subject to duties. They will be billed by the carrier, and you will be responsible to pay them. Prioritize ordering items that are in stock!
Until May 2nd, 2025, orders under US$800 will not incur any duties or taxes upon delivery. Please note that orders under US$800 crossing the Canada-USA border after this date will be subject to duties. They will be billed by the carrier, and you will be responsible to pay them. Prioritize ordering items that are in stock!
  • Works in conjunction with Celestron's Smart DewHeater Controllers to allow "smart" control of third-party dew heaters
  • Regulates heating bands or straps to conserve power by only delivering enough heat to the optics to prevent dew
  • Sealed tip positioned under the heating band or strap provides accurate temperature readings

Take the guesswork out of using third-party heating bands or straps and increase your power efficiencywith the Celestron Thermistor for Smart DewHeater Controllers. This accessory allows the Smart DewHeater Controller (sold separately) to deliver just the right amount warmth for to your telescope’s correctorto prevent dew without wasting battery. 6’ cable length accommodates a wide variety of configurations.

How it works

Connect the heating band to your telescope and place the Thermistor's sealed probe tip under the heating band. Plug each cable into its corresponding port of the Smart DewHeater Controller.

NOTE: This thermistor is not required if you are using a Celestron Dew Heater Ring because the ring already contains a built-in thermistor.

Enhance your setup

We also recommend adding a dew shield to your setup. While not mandatory, a shield will cut down on the amount of power the your dew heater needs to keep the optics clear.

Plug: 2.5mm Audio
Cable Length: 1828.8mm (72")

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