Kendrick Optical Tube Heater Elements
Canadian Company 
Our Premier Brand heaters are the best heaters made and they produce considerably more heat than any other brand. You don’t always need the extra heat, but there are going to be times that you are glad to have it.
Premier Heaters are designed to be used with cameras and camera lenses, telescopes optics of all kinds, binoculars and temperature sensitive electronics.
Premier Heaters require the purchase of one of our
Dew Controllers . Our systems are all 12 VDC with the exception of our #2021-A Digi_Klear Pad Heater which runs on 120 VAC.
We have heater systems for virtually any optic or electronic device used in amateur astronomy, outdoor photography and medical operating rooms. They are designed to keep electronic devices functioning and optics moisture free in humid and/or cold working environments.
The Premier Heater line is our flagship brand and our highest quality heater. They are built of the highest possible quality materials and the heaters are custom built to our electrical specifications. These are not off-the-shelf heaters! We use the best quality velcro, elastic and flex heaters available for this line. The cables are cold flexible down to temperatures of -40 and the cable housing is custom make for Kendrick to our specifications. All our competitors use cable that gets stiff and brittle in cold environments.
Our heaters have been built to use only as much power as necessary and thereby not waste energy. They have built in foam insulation on one side to help prevent heat loss in the atmosphere and direct the warmth generated by the heaters into the optics.
Technical Specification
Heater Specifications
Below, we provide a breakdown of the wattage and amperage of most of the Premier Heaters we make. This will aid in choosing the correct controller for your system as your controller must be able to handle the amperage requirements of your heaters, no matter what controller setting you use. For example, if you set your controller to operate at 30%, the heaters will draw their full amperage 30% of the time. The other 70% of the time they will be off.
NOTE: Our competitors often quote what they consider the high power requirements of our Premier Heaters. It is important to note that the ratings quoted below are true if your controller is set to operate at a 100% setting. To clarify, if you set your controller to operate at 30%, the heaters will draw their full amperage, but only 30% of the time. The other 70% of the time they will be off. Also, these heaters are intentionally designed to generate more heat than our competitors heaters as they are designed to perform under ALL conditions.
| Item No. |
Heater |
Wattage |
Amperage |
Heater Dimensions
Metric* |
Heater Dimensions
Imperial* |
| 2003 |
Telrad Heater |
6 |
0.4 |
50 x 90 mm |
2" x 3.5" |
| 2003-RDF |
Red Dot Finder Heater |
2.5 |
0.2 |
Press fit |
Press fit |
| 2004 |
.965" Eyepiece Heater |
2.5 |
0.2 |
16 x 75 mm |
1/2" x 3" |
| 2005 |
1.25" Eyepiece Heater |
3 |
0.2 |
16 x 125 mm |
1/2" x 5" |
| 2006 |
2" Eyepiece Heater |
4 |
0.3 |
16 x 175 mm |
1/2" x 7" |
| 2006-C |
Large-Body, extra long Eyepiece Heater |
10 |
0.8 |
75 x 205 mm |
1" x 9" |
| 2006-L |
DEW-Minator Large Eyepiece Heater |
10 |
0.8 |
75 x 205 mm |
3" x 8" |
| 2007 |
3" Optic Heater |
10 |
0.8 |
25 x 280 mm |
1" x 11" |
| 2008 |
4" Optic Heater |
11 |
0.9 |
25 x 370 mm |
1" x 14.5" |
| 2009 |
5" Optic Heater |
15 |
1.2 |
25 x 460 mm |
1" x 18" |
| 2010 |
6" Optic Heater |
17.5 |
1.4 |
25 x 560 mm |
1" x 22" |
| 2011 |
7/8" Optic Heater |
20 |
1.6 |
25 x 660 mm |
1" x 26" |
| 2012 |
9/10" Optic Heater |
25 |
2 |
25 x 890 mm |
1" x 35" |
| 2013 |
11" Optic Heater |
28 |
2.3 |
25 x 965 mm |
1" x 38" |
| 2014 |
12" Optic Heater |
33 |
2.6 |
25 x 1115 mm |
1" x 44" |
| 2015 |
14/16" Optic Heater |
52 |
4.1 |
25 x 1270 mm |
1" x 50" |
| 2005-B1 |
Bino-viewer Heaters for eyepieces up to 1.5 inch barrel diameter. |
5 |
0.4 |
16 x 125 mm |
1/2" x 5" |
| 2005-B2 |
Bino-viewer Heaters for eyepieces over 1.5 inch barrel diameter. |
8 |
.6 |
16 x 175 mm |
1/2" x 7" |
| 2016 |
Secondary Mirror heater for Newtonian secondary mirror 1.83" to 2.14" |
2.5 |
0.2 |
44 x 66 mm ellipse |
1.75" x 2.6" ellipse |
| 2017 |
Secondary Mirror heater for Newtonian secondary mirror 2.5" to 3.40" |
4 |
0.3 |
50 x 90 mm |
2.5" x 3.625"ellipse |
| 2018 |
Secondary Mirror heater for Newtonian secondary mirror 4.00" and up |
9 |
0.7 |
50 x 90 mm |
3.75"x5.50"ellipse |
| 2019 |
Electronic Hand Control Pad Heater |
10 |
.8 |
57mm x 165mm |
2.25" x 6.5" |
| 2020 |
Eyepiece Box Heater |
10 |
0.8 |
57mm x 165mm |
2.25" x 6.5" |
| 2021 |
Computer Heater for Laptop Computers |
36 |
3.0 |
215mm x 280mm X 9mm |
8.5" x 11" X 0.35" |
| 2022 |
Rigel Quik Finder Heater |
2.5 |
0.2 |
16 x 75 mm |
.5" x 3" |
Fitting
The table below will help you to determine which heater is the right one for you scope.
| .965" |
for .965" eyepieces and finder scope eyepieces |
| 1.25" |
for 1.25" eyepieces |
| 2" |
For 2" eyepieces, 50 mm finder scope objectives, smaller camera lenses. Can also be used on 1.25" oculars but a bit big. To use on 1.25" oculars just slip heater off 2" eyepiece and hang over 1.25" eyepiece. |
| 3" |
will fit 3.5" to 5" OD (90mm to 130mm OD) |
| 4" |
will fit 5" to 5.5" OD (130mm to 145mm OD) |
| 5" |
will fit 5.5" to 6.5" OD (140mm to 165mm OD) |
| 6" |
will fit 6.5" to 8" OD (165mm to 200mm OD) |
| 7/8" |
For Meade 7" refractor, 7" Maksutov-Cassegrain, 8" SCT, Celestron C8, Astro Physics 7" Refractor. Will fit 8" to 9.5" OD (200mm to 250mm OD) |
| 9/10" |
For Celestron C9.25, Meade 10". Will fit 10" to 12.5" OD (250mm to 310mm OD) |
| 11" |
For Celestron C11. Will fit 12.5" to 13.5" OD (310mm to 340mm) |
| 12" |
For Meade 12 SCT. Will fit 13.5" to 15.5" OD (340mm to 400mm OD) |
| 14/16" |
For Celestron C14 & Meade 16" SCT. Will fit 15.5" to 18" OD (400mm to 460mm OD) |
| Laptop computer heater |
For all lap top computers, can also be used on for desktop CPUs that are exposed to cold temperatures. Also makes a great seat warmer! |
| GoTo Telescope Control Pad Heater |
For Meade, Celestron, Orion, SynScan & other GoTo Telescope hand held control pads. Keeps control pads working in cold winter temperatures. |
| Eyepiece box heater |
For eyepiece and accessory boxes. Can also be used as a seat warmer. |
In the Box
Dew Heater Strap
Manual & Warranty
Kendrick 1-Year Warranty
Attaching Heaters
Generally, our heaters wrap around your optics, label side out and are held in place by elastic/Velcro attachments. The heaters for Newtonian/Dobsonian Secondary Mirrors, depending on which model you purchase, are either placed on the backside of the secondary and can be held in place by using the polyester batting found inside the secondary mirror holder (heaters #2016, 2017, 2018, DG-1, DG-2, DG-3) or will wrap around the secondary mirror stalk (heaters #2028 & 2028-S). Newtonian Primary Mirror Heaters sit behind the primary mirror in contact with the back side of the mirror. Your mirror holder must allow for removal of your primary mirror to accomodate a primary mirror heater.
