Dew Heater Straps - All Sizes

Product Code: Dew Heater Strap
Brand: Dew Control
Weight: 150.0g
Product Condition: New
Units in Stock: 84


These dew heater straps are designed to work with 12V power supplies and produce heat to keep dew off of the objective lens or eyepiece. A simple design but astonishingly good quality materials and finishing.

It's main advantage is its low power consumption (0.2W/cm). It's made to be easily wrapped and held in place with the attached elasticated Velcro strap. 

Comes with *2m* of flexible silicone cable with male RCA/Phono connector.  Current draw is dependent on size and at 12V

Compatible with all popular controllers, but work especially well with our own.

If you require a different connector than the standard RCA supplied, please choose from the option list below.  The ASI Air Pro and Air Plus both require 2.1mm DC barrel plugs for direct connection.  If you still wish to use your straps with a conventional controller that uses RCA connectors, then we also sell RCA to 2.1mm adapter cables.

* If you need a shorter cable than the 2m standard, please state what you need in the comment box on checkout and we will make to suit your requirements.

Strap Length Power (Watts) Current @ 12V (Amps) Suitability
11cm 2.0 0.17 For 1" and 1.25" Eyepieces
15cm 3.0 0.25 For 1.25" Eyepieces
20cm 4.3 0.36 For 2" Eyepieces
30cm 6.4 0.53 For camera lenses and 3" scopes
40cm 8.4 0.70 For 4" telescopes
50cm 10.6 0.88 For 5" telescopes
60cm 12.2 1.02 For 6" telescopes
70cm 14.4 1.20 For 7" telescopes
80cm 15.6 1.30 For 8" SCT's
100cm 19.8 1.65 For 9.25" and 10" SCT's
120cm 24.0 2.00 For 11 and 12" SCT's
150cm 30.0 2.50 For 14 and 16" telescopes


Please note! The OTA size is only estimated. Please check your OTA circumference before purchasing.


£15.00 inc. tax

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Customer Reviews
(write review)
Excellent heater 5 product stars
"The quality of this heater tape is excellent, and the service from Dew Control is first class. The cable is soft and pliable even in freezing weather and it provides plenty of warmth for even the coldest night." Arthur Fentaman - 23 November 2018
Excellent Service! 5 product stars
"Excellent quality and Excellent Service!!! Very satisfied." George Khasabov - 19 February 2021
A must-have! 5 product stars
"The strap is very well finished, excellent materials, power connector and cable are both superior quality: heater straps are often necessary and buying "low power consumption" products is a big mistake I did, because power is what you need to keep dew away. Dew Control heater straps have plenty of power, based on strap lenght (telescope diameter); a dew controller is perfect to avoid any waste of power, when not needed. Great purchase, quality products, pro seller." Gianluca Beccani - 19 December 2020
Excellent Product & Great Customer Service 5 product stars
"Ordered 2 heater straps with 20cm cables for my short focal length refractor at 1pm, they arrived the next day and work great. Highly recommended." Olly Barrett - 09 May 2021
Great quality and as described 5 product stars
"Two heater straps and control unit delivered by Tim and his team. Delivery took a while, but I believe that was related to issues with Royal Mail, and not Dew Control. The product itself is of great quality. Cables are made of material that stays soft even in cold Norway winter conditions" Henrik Riise - 17 March 2023
Thankyou 5 product stars
"Hi all, Thanks for quickly sending the eyepiece warmer. I was very impressed with the speed with which it chased the fogging away on my eyepieces. I used my FLIR camera to take a heat image of my rig with the heaters on. Cheers, Bryan" Bryan Dawson - 11 September 2018
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