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Kendrick Premier Heaters
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 which can found at this link. 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.
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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) 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.
Eyepiece Heaters
Customers regularly ask if eyepiece heaters are necessary. They are just as much a necessity as the heater for the main lens or mirror in your telescope. In cool environments, moisture from your eye condenses on the eyepiece glass and without heat, is very difficult or impossible to remove.
We manufacture four sizes of eyepiece heaters:
- #2003 - for eyepieces on finderscopes.
- #2005 - for 1.25" eyepieces and that do not have a huge body (For example: Plossls, Vixen Lanthanum and similarly sized eyepieces).
- #2006 - for larger bodied (but not massive) 1.25" and 2" eyepieces (For example: Baader Hyperion and Orion Stratus eyepieces).
- #2006-L - for large body (tall) 1.25" and 2" eyepieces (For example: Televue's Naglers, Ethos and Delos, Celestron's Lumina eyepieces, Explore Scientific's eyepieces, etc).
NEW!! Introducing our newest heater in the Premier Heater line, the DEW-Minator Large Eyepiece Heater!
This heater has been designed specifically for the ever increasing line of large format eyepieces available to the amatuer astronomer. It provides plenty of power for those cold or really humid nights yet can be adjusted (via a Kendrick controller) for very mild, low power operation if your conditions call for it.
Like all our heaters, it has a sewn in, heavy duty elastic strap to allow you to securely fit it to any of your large bodied eyepieces.
Surgical Microscope Eyepiece Heaters
We have sold a number of our systems to hospitals who use them to clear condensation on the eyepieces of their surgical microscopes.
When a surgeon places his/her eye next to the ocular in the microscope in a cold operating room, mositure from the eye will condense onto the glass, rendering the microscope unusable until the moisture in cleared. Wiping the moisture from the glass is ineffective as the moisture will immediately reappear when the eye is again placed to the ocular. Applying a gentle heat to the glass is the only really effective method to prevent moisture condensation on these oculars.
Our heater systems have proven to be 100% effective at curing this problem. One of the most notable users of our heater systems in the medical field is Dr. Gazi Yasargil, who was elected "Neurosurgery's Man of the Century 1950-1999". Dr. Yasargil has been a regular user of our products and a happy customer of Kendrick Astro Instruments for many years now. We have Dr. Yasargil's permission to use his name in this endorsement. The heater system for the surgical microscopes consists of the following items:
- #2001-SDCC Standard Dew Channel Controller.
- 1 set #2006-B1 Bino Viewer Heaters.
- 1 x 8' long extension (from controller to heater array).
- 6' long power cable (from 12 vdc power source to 2001-SDCC Controller.
- 1 x #2085 120volt to 12 volt DC, 5 amp Regulated Power Supply.
Please see Surgical Microscope Eyepiece Heaters for more information on this product.
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-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" |
| 2006-B1 | 2" 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" |
Heater Extensions |
We make cold flexible heater extensions for our heaters. The standard power cord length for our heaters is 4 ft but if you require longer lengths for your heaters, consider the purchase of one of these extensions. They are available in 2ft, 4ft, 8ft and 10 ft lengths.
We offer these heater extension cables as sometimes the standard 4' power lead length is not enough for your application. If you require longer extensions than what is offered below, please contact us.
These extensions are cold flexible down to -40 C.
Fitting Dimensions |
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. |
How To Use The System |
Our Premier Heaters require the purchase of one of our controllers which can found at this link. Our systems are all 12 VDC.
We recommend that you put your heaters in place at the beginning of an observing session and turn your controller on right away. For Premier Heaters, or heaters for Newtonian or RC Telescopes, we recommend a controller setting that represents about 20 to 40%.
If moisture has already condensed on your optics, we recommend covering the optics, turning the heaters on high and waiting 20 to 30 minutes. Once the moisture has cleared, lower your controller setting and resume observing.
Power Requirements |
Our dew control systems require 12 volts DC. If you are using a battery to run the system, we recommend a 5 amp hour battery as a minimum. If you want to run the system from a wall plug, you will need a 120 volt to 12 volt DC "Regulated" step down power supply with a minimum output of 5 amps.
Pictured to the right are our Regulated 120 volt to 12 volt DC power supplies which are excellent for operating our systems from a wall socket. We also build portable 12 volt power packs and offer other power solutions that can be used with all your astro equipment that is used in the field. See Power Packs for more information on the power systems we offer.
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How much power do you need? Add up the current draw from all connected equipment and then multiply by at least 2. Generally, you want a power supply that can deliver twice as much power as you think you might need. Otherwise, an overworked PS is going to fail or even get excessively hot.
NEW Big-Honkin 25 Amp Power Supply (110VAC or 220VAC)! Big mounts, cooled CCD Cameras, Dew Heaters use a lot of juice. 25 Amps is enough power to run just about any device you would ever need. |
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