Dew Heater Module - Telrad
Product Code: TR01
Rating: Be the first to write a review
Brand: Dew Control
Weight: 30.0g
Product Condition: New
Units in Stock: 31
This heater module has been designed specifically for use with the common Telrad Reflex Finder. The module affixes to the Telrad finder on the plastic under the glass viewing window using the attached double sided tape and when powered, delivers a small amount of heat to the window stopping it from fogging up on 'dewy' nights.
The unit runs from a 12v DC source and can be purchased with and without power cabling and various connector options. Current draw at 12v is 0.1A (1.2 Watts).
Now only available in black to match the Telrad. Green option no longer available.
£12.00 inc. tax
Customer Reviews
(write review)Superb!
"I thought I d let you know that I ve just tried that Telrad dew heater you sold me at Kelling and it worked superbly. As luck would have it this evening has been both clear and dewy so I was able to give it a test run right away. Rather than test it as a merely preventative measure I waited until the Telrad dewed up before switching on the heater. Within about five minutes the bottom half of the Telrad screen was clear, which was enough to make it useable. It then took only another five minutes or so to completely clear the screen and keep it clear. I am a very happy person right now and look forward to plying you with a suitable amount of alcohol at Kelling next year." Andy Turner - 09 November 2019
Excellent Service - Again
"This is the second Telrad dew heater that I have purchased and, yet again, it is of the highest quality and I have received prompt, efficient service, despatch and delivery. I had previously purchased a dew shield for my Telrads but that really didn t work at all. These dew heaters do the job nicely with minimal current draw. I don t use a dew heater controller, just daisy-chained cables into a 12v dc supply. You can also specify the length of cable and method of termination which, in my case, was 2.1mm sockets." Mick Wright - 02 November 2025
Works great - thankyou!
"Have this heater attached to the Telred on my Celestron NexStar 6SE and controlled by a DewMaster 2. Works absolutely perfectly and I no longer have sessions cut short from dew. Easy to fit, easy to order and arrived quickly. Thanks very much - great product that I am glad I found." Roch Gadsdon - 26 October 2025
Two thumbs up
"Online ordering was easy, delivery approx 2 weeks by AIRMAIL, product was just a ordered, installation easy, and it works like a dream in a side by side test at a star party with an unprotected telrad 3 meters away that was Dewed up 30 mins after dark and I was dew free all night. Thanks a bunch, Jim." Jim from Canada - 19 October 2023
Handy and effective
"Installation was easy and the design is simple and clever. I've used this on humid autumn weathers and freezy winter nights and the glass is always clear no matter what the RH and temperature are. This picture was taken after 4 hours of observing in -12 celsius RH 80%. I love how this integrates to the sight and eliminates the need for any additional heater straps or caps." Aku Pihlajakumpu - 05 December 2024
Works very well
"Telrad heater was delivered quickly and does a great job. Can't really say much more apart from if you have a Telrad you need one of these." Ron Havelock - 20 November 2025
