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RVO Heater Bands With Integrated Controller

RVO Heater Bands With Integrated Controller
Price:  £21.99(Inc. 20% VAT)

Model:  RVOHB20CM
Brand:  Rother Valley Optics

2 Year Warranty On All New Items
(Excluding Batteries & Globes)

  (3 Reviews)

We are pleased to announce our new range of heater bands. Very well made bands with an integreated controller for temperature adjustment. These will connect directly into a 12v power supply with a 2.1mm plug, which is standard on most Skywatcher and Celestron power tanks.

If you already have a controller, these bands also come with an adaptor to remove the controller, so they plug directly into most multi channel controllers.

The range of bands are a wider fit than other bands on the market making them more effective for dew prevention.

Various sizes are available to suit most telescopes. Please select the correct size from the drop down box above.

For any compatiblity or power queries, please get in touch with us.

Average Rating (3 Reviews):  
Write a Review and share your opinions!

Excellent Value for Money
14 April 2021  | 

As a newbie to astrophotography I was starting to get frustrated with problems always costing a lot of money to remedy! The newest one was dew building up on my lenses over the colder, but humid, Winter evenings. During my investigation for dew heaters I went down the rabbit hole of power boxes and dew heater controllers to fix what should be a very easy solution. Enter the RVO heater band.

These heater bands are really easy to use and do not require an expensive dew heater controller box! You just need a 12V DC power source to power the band and adjust the heat level using the scrolling wheel within the supplied integrated controller (think like a dimmer light switch). I use an ASIAir Pro (AAP) and I'm delighted to write that these heater bands plug straight into the AAP and work very well!

My AAP is powered by 12V DC at 5A current which is plugged directly into mains electric (it's recommend to run this current with the AAP if you're powering many other devices). My AAP in turn powers the following devices:
1.) Two RVO heater bands (one for main telecsope, one for guidescope)
2.) An ASI533MC main camera (cooling)
3.) An ASI120MM guide camera
4.) Power for Skywatcher Star Adventurer Pro 2i mount

The dew heaters still perform excellently despite all those devices being connected and dew is now a thing of the past

Note on the sizes. I bought the smallest band size (20cm) to fit my guidescope which is the 32mm WO guidescope and I found that the strap was longer and wider than is needed. There was around 4cm of overlap (about 20% of the total length) and the width of the band (5cm) means that the lens cap and focus lock ring is almost completely covered by the strap. Not a big deal, but given that the guidescope is so small, it seemed a bit overkill to have a bulky heater band around it. I bought the 30cm version for my WO Redcat51 and this is a perfect fit and do not have any comments or concerns.

When I move up to a larger telescope I will definitely consider buying another one of these bands!

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5 of 5 people found this review helpful.

Great Dew heater Bands, well made
13 April 2021  | 

These are really great Dew Heater Bands.
No more expensive than others on the market, they have an elasticated band that keeps them nice and snug to the scope body, nice flexible cables with plenty of options:
1) direct to any 12V supply with a 5.5 / 2.1 mm connector (Standard connector for 12V in Astro Kit.
2) Normal Phono Plug connection to a Dew heater controller (again standard connectors on heater controllers)
3) No need to buy a separate controller they have an in line 12V controller, so small you hardly notice it but it works fine, again use this on either type connector.
If you do not already have a Dew Heater controller buy these and save the money for something else

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1 of 1 people found this review helpful.

Does there job well
13 September 2020  | 

This works well on a 127mm maksutov, even in heavy dew. I haven't tested it for de-icing in sub zero temps yet.

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2 of 2 people found this review helpful.

Some items that are showing as in stock are in stock at our holding warehouses, not at the shop. To double check the stock levels at the shop, please contact us on 01909774369 or

The delivery times for most items is 1 - 2 days but again, please double check stock levels on important orders before placing an order via the website.

The delivery costs for courier next day are for mainland UK only. If you live in the Scottish Highlands/Islands, Channel Islands or Northern Ireland, then a shipping surchage will apply. please contact us for prices. Smaller items can still go 1st class via Royal Mail.

Please note that if you are wanting to take advantage of our Saturday and Sunday timed services or next day pre 12 or pre 10:30 services, you MUST check that the stock is here at the shop before placing orders. Also, orders using the Saturday and Sunday services must be placed before 1pm the previous working day. Also, please remember to check that the stock is here at the shop before placing orders. If the stock is not at the shop, we won't be able to ship on any of the timed services. 

Please note International customers will need to contact us for a shipping price prior to ordering via the website. We don't ship all items internationally. It is at our discretion what we ship outside of the UK. This all depends on the size and weight of the items. Please get in touch with us for any postage costs. Please note we do NOT ship telescopes or heavy items outside of the UK. This is due to massive postage costs and problems regarding returns.

If you have any questions regarding stock levels or delivery, please get in touch.

Zygo Interferometer Testing For ED Refractor Telescopes!

We are extremely pleased to announce our Zygo Interferometer is now installed and ready for use! Our experienced staff can test refractor lenses up to 120mm aperture and provide a comprehensive 2 page report showing the optical quality and Strehl ratio, plus much more information. We are using the very latest Zygo MX software to provide a more detailed report compared to other standard reports.


The interferometer is essentially a measuring instrument. Within the interferometer is a calibrated laser that is pointed through the optical test surface, then onto a high quality reference sphere, then back through the test subject then to an internal camera which gives us the measurement on the screen. From this, we can adjust the position of the test optic and the reference sphere to obtain a perfectly calibrated system. The more central the laser to the test optic and then on return, the better and more accurate reading and measurement we can take. This takes a lot of adjustment to get the best results from the optical surface. Once the measurement has been taken, we are provided with a series of results that show the optical quality of the surface plus other information. Continue reading for an explanation of the individual values and you can also see a test report that was done on one of our RVO Horizon 60 OTAs. 

We are offering certain telescopes with a Zygo test at an extra cost. Mainly ED doublets and triplets. All available telescopes with a Zygo test report are listed here. Just select Zygo Test Report from the drop down box at the top of the listing and we will test the optics in house and provide a full 2 page report with your scope. This will show you the optical quality of your telescope optics. We can also offer this service on your refractor telescope. Please get in touch for more details about this. 

At Rother Valley Optics, one thing we pride ourselves on is customer service and quality of our equipment. When we test your telescope, we will ensure that it is of the highest quality otherwise, we will reject the scope under our strict quality control and test another model for your peace of mind. One of the main values to look at when testing a refractor is the Strehl ratio. The higher this number, the higher quality lens you have. At Rother Valley Optics, we will guarantee the highest possible Strehl ratio for your telescope.  We will aim to provide 0.95 Strehl or higher on Takahashi, RVO Horizon, William Optics and many more! Generally, the higher the Strehl ratio, the lower the Astigmatism and Coma meaning a better image quality from your instrument. 

Other measurements such as the PV and RMS are important too. With these measurements, the lower the number the better as it shows less curvature on the lens. The flatter an optical lens, the better it will perform. The PV rating (Peak To Valley) is a measurement from the highest point (Peak) to the lowest point (Valley). From this we get the RMS (Root, Mean, Square). This is a similar figure to the PV and measured exactly the same way. The RMS is basically an average height difference from the PV so again, the lower the better. As you can see form the example below, we measured an RMS of just 0.027 wave which is a very good value.

We also measure the Power with our systems which is essentially the error from the reference sphere to the test optic. The reference sphere we use on our system is a very high quality sphere so the closer to zero the Power, the less error between the 2 elements thus ensuring a higher quality optical surface. 

You will also see some more values such as Astigmatism and Coma. Again, these are measured by the interferometer when we take measurements of the optical surface after adjustment. These are values which ideally would be at 0 but as our test optics are all curved lenses, there will always be astigmatism and coma present. The lower the number, the less of these aberations you will effectively see but with most refractors, you can buy field flatteners which will compensate for the coma anyway. The astigmatisms value is explaining the error between the symmetrical curvature of the lens. Basically, no lens will be perfectly symmetrical, the lower the astigmatism, the more symmetrical the lens surface is. 

Once the Zygo test report has been completed, the optical alignment is thoroughly tested and tuned to ensure they are spot on before they leave us. 

All available telescopes are on the website at the link below and ones we've tested already that are available straight away are also listed.

Here is an example of the test what we provide. This was a test on one of our Horizon 60 ED OTA's.

For any questions about this amazing new service, please either call 01909774369 or email


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