ATN THOR-HD 640 2.5-25x50 Thermal Rifle Scope

Model no: TIWSTH643A

Not exportable outside of the USA. See Export Policy

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Please consider this similar product instead
ATN ThOR 4 640 2.5-25X50 Smart HD Thermal Riflescope

Not exportable outside of the USA. See Export Policy

ATN ThOR-HD 640 2.5-25x50 Thermal Riflescope Features


At billion cycles per second, the ATN Core pushes optics into the 21st century!
Utilizing high-resolution sensor with distinct night vision capability.
The Obsidian Core is a highly specialized computer that is designed to run a suite of sensors and crunch huge files in a blink of an eye.
It is easier than setting up your smartphone and you can use your phone to customize your ATN THOR-HD 640 device.


Ballistic calculators were never this easy. No more charts, complex reticles, and calculators. The ATN Obsidian Shooting Solution does it all. Range in with your Smart Range Finder, enter your wind readings and let the Obsidian Core do the rest.Turn through the wind, change your incline angle, adjust distance and instantaneously your point of impact will shift to have the perfect shot every time.


You have more important things to worry about then remembering to press the record button before each kill shot. But boy wouldn’t it be nice to have that video afterwards? Recoil Activated Video (RAV) takes care of all your worries. Just relax and focus on your game and let the Obsidian Core do the heavy lifting.When you set your video record to RAV, the system buffers everything your scope sees. As the trigger is pulled you are left with a full video of what you saw before the shot was taken, the moment of, and as much video after as you care for.


Save all the Ballistic and Zeroing-in data in the profile Manager for every weapon that you plan to use the X-Sight on. No worries about resetting everything up every time. Just create a new profile and you are ready to go.


Our Patent Pending Smart Range Finder will make your life easier than ever. With only two clicks and a simple shift of the scope you will be able to range your target. Once ranged in your reticle will automatically adjust its point of impact. No more guessing, chart memorization or complex calculations.


Make capturing your experiences in stunning HD a regular part of your adventures.
No more missed opportunities for that once in a lifetime moment. Record videos and take photos to bring your adventures back home to share with friends, family and on social media.


We make it easier than ever to capture and share your videos
with your friends and family back home and online


Unlike many traditional optics, the silky smooth zoom helps you get up close
and personal with everything you’re looking at.


We carefully designed our smart devices taking proper account of the interaction between them and the people that use them


The E-Compass let you know exactly what direction you need to head so you can move a little closer and get a better shot at that monster buck you’re tracking.


Improve ability to smoothly spot game by activating the built-in gyroscope & image stabilization! Steady your view and make the experience a lot of more fun!


The E-Compass let you know exactly what direction you need to head so you can move a little closer and get a better shot at that monster buck you’re tracking.


By utilizing the ATN Obsidian app, you can control your device and view live streaming. Connect a phone or tablet and view everything simultaneously.Want to see what you’ve recorded so far? No problem, once connected to the app via WiFi, open up the Gallery and playback your latest adventures. All your photos and videos are right at your fingertips. 

ATN THOR-HD 640 2.5-25x50 Thermal Rifle Scope description

From Night Vision Guys about ATN ThOR HD 640 2.5-25x50 Thermal Rifle Scope TIWSTH643A

In 2016 ATN took yet another novel approach to thermal scopes.  Using some of the technology developed for the X-Sight scope and BinoX binoculars in 2014 and 2015, they redesigned the entire ThOR line to be based on Obsidian "T" II Thermal cores instead of the FLIR cores used previously.  Results seem to be impressive.  The new ATN ThOR HD thermal scopes pack a ton of modern technologically advanced features.  How well these new cores will hold up compared to the proven FLIR cores used in the past remains to be seen, but the 3 year body / 10 year core warranty ATN offers puts our concerns to rest.  

This particular model featuring 2.5-25x progressive zoom with a 50mm objective lens is ideal for mid range hunting.  Competitively priced and packed with features, this ATN thermal scope is probably the ideal choice for most hunters as it covers the standard 75-300 yard hunting range.  

Some key features of the ThOR HD Series:

  • Smart Range Finder
  • Recoil Activated Video (RAV)
  • Wi-Fi
  • Bluetooth
  • Gyroscope
  • Magnetometer
  • Accelerometer
  • E-Barometer
  • Smooth Zoom
  • Profile Manager
  • E-Compass
  • GPS Geotag

From ATN about Smart ThOR HD 640 2.5-25x50 Thermal Rifle Scope and THOR-HD Series 

In 2016 ATN has changed the Landscape of Thermal Hunting! Smart ThOR HD scopes powered by Obsidian Core have raised the bar like never before.

The most technologically advanced line of thermal rifle scopes on the market bar none! The all new Obsidian "T" II Thermal core beats at the heart of our systems. More power, more features, smaller packaging, and lower cost have allowed ATN to make the biggest update to its award winning thermal product line. Record videos and photos onto a MicroSD card. Never again forget to record that perfect shot with ATN's patented RAV (Recoil Activated Video). Use ATN's Smart Range Finder to quickly range in on your target and allow the ballistic calculator to make instantaneous corrections to your POI on the fly. 
Smooth Zoom, built in WiFi, Bluetooth, 3D Gyroscope, 3D Accelerometer, 3D Magnetometer are but a few of the features and sensors packed into these incredible systems.

Thermal Imaging

Please note that most thermal devices are built per order.  It may take 3-5 days or more for your order to ship.  If timely shipping is important to you, please, contact us to verify availability prior to ordering. 

Thermal devices can produce various types of images.  Some are color others are monochrome.  In either case change in shade or color indicates temperature differences.

color thermal image thermal bw image

Here is how thermal imaging devices work...

A special lens focuses the infrared light emitted by all of the objects in view.

The focused light is scanned by a phased array of infrared-detector elements. The detector elements create a very detailed temperature pattern called a thermogram. It only takes about one-thirtieth of a second for the detector array to obtain the temperature information to make the thermogram. This information is obtained from several thousand points in the field of view of the detector array.

The thermogram created by the detector elements is translated into electric impulses.

The impulses are sent to a signal-processing unit, a circuit board with a dedicated chip that translates the information from the elements into data for the display.

The signal-processing unit sends the information to the display, where it appears as various colors depending on the intensity of the infrared emission. The combination of all the impulses from all of the elements creates the image.

There are a few key Manufacturers when it comes to thermal imaging.  

ATN: produce such well knows devies as ThOR-HD thermal scope, BINOX-THD thermal binoculars, and OTS-HD thermal monocular.  

FLIR/Armasight: the largest maker of consumer level thermal products is well knows for their full product line.  Zeus thermal scopes, Q14 and Scout monoculars, Helios and Scout binoculars and many more.

Pulsar: a very popular brand for digital night vision and thermal imaging.  Key products include Pulsar Trail and Apex thermal scopes and Pulsar Helion and Quantum thermal monoculars.

Seek: mobile device mounted thermal cameras are the main products of this brand.

Delivery Time and Manufacturing Process for ATN THOR-HD 640 2.5-25x50 Thermal Rifle Scope:

Most of our manufacturers do not keep products like ATN THOR-HD 640 2.5-25x50 Thermal Rifle Scope assembled on the shelf. Night Vision tubes are kept separate from the body of the unit. When the order is placed, the manufacturer starts the order processing and assembly process which includes the following:

  • Order processing - we collect all the necessary information including address and phone numbers. We also make sure that our customer ordered the correct product for their needs and that the product can be exported by US law to the country of destination. In some cases a signed export compliance form is required.
  • QC - in this step the manufacturer will inspect all individual parts which will be used to assemble the night vision device for any defects.
  • Production & Assembly - during production, all the parts are put together. Night Vision tubes in inserted into the body of the unit and all the complex electronics for the device are connected. This process takes place in a special lab called the "clean room" as even a small speckle of dust can cause undesired optical effect.
  • QA - one the night vision device is assembled, it goes through a rigorous testing process to make sure it meets all the expected specifications and all parts function as expected. For this most manufacturers have a special "dark room" designed to allow testing of the units without causing incidental damage to the night vision tube by exposure to bright light.
  • Packaging - this is a key process as well. In most case your night vision device will be shipped to you directly from the manufacturer but sometimes needs to be sent to us first. In either case items need to be packaged securely to avoid any kind of damage during transportation.
  • Shipping - as described above items will most of the time ship from the manufacturer. For most domestic orders (unless shipping to POB or AFB) a premium shipper like FedEx or UPS will be used.

Only by following the above steps can we along with our manufacturers bring you - our customer - night vision products of highest quality, However as you can understand the above process can take several days to complete. For example if your device fails QA, the entire process restarts. Also at QC stage a manufacturer may realize that the tube they have in stock has a defect and a replacement tube needs to be ordered. Due to the complexity of this process, it is prudent to expect 3-4 business days for production and handling of the purchased device. Keep in mind that this process is designed to guarantee your satisfaction with the night vision device of your choice.  It occasionally possible to expedite the process for urgent orders but addional fees or other restrictions may apply.

Technical Specifications

SENSOR 640 x 480
ANGLE OF VIEW 12.5 x 9.7
CORE ATN Obsidian "T" II
IP RATING Weather resistant
VIDEO RECORD RESOLUTION 1280x960 at 30 fps
MICRO USB External Battery Pack
RETICLES Multiple Patterns & Color Options
MOUNT Picatinny Quick Release Mount, Interchangeable
BATTERY TYPE 4 AA (Lithium Recommended)
DIMENSIONS 8.81" x 3.16" x 3.14"/224 mm x 80 mm x 80 mm
WEIGHTLBS 1.85 lbs
WARRANTY Two years

Questions on ATN THOR-HD 640 2.5-25x50 Thermal Rifle Scope

From on

Q: What is the frame rate for this unit 30hz of 60hz?

A: The thermal scope itself is capable of 50hz, however the initial software version which the unit will come with will be at 30hz. ATN is planning to have a software update later in the year to activate 50hz capability.

From on

Q: There's been some confusing discussions on the Texas hunting forum about the New ThOr-HD thermal scopes. The confusion is with the "core" of the new line of ThOr-HD thermals. Is the below statement correct? are there two separate components or is the thermal sensor built in the Obsidian core. 1. Obsidian core:(Computer) "The Obsidian Core is a highly specialized computer that is designed to run a suite of sensors and crunch huge files in a blink of an eye." (operating at a billion cycles per second) 2. Thermal Sensor: (Obsidian "T" II Thermal core) "Utilizing high-resolution sensor with distinct night vision capability" (operating at a frame rate 30hz). Also, now that ATN stop using the FLIR for the new ThOr-HD line, what company make the "Obsidian "T" II Thermal core"? are they made by ULIS (French),

A: Hi Eddie. What you wrote is correct. Obsidian does not stand for thermal specifically it is just the operating platform. That's what provides all the smart features like wireless connectivity, video recording, etc. Digital night vision and thermal sensors are then connected to this platform depending on the type of device we are looking at. We were told that though the units currently operate at 30hz they are capable of 50hz. This seems (we are not sure) to be a software issue which is limiting the refresh rate and is likely to be addressed in a later firmware upgrade. As for who makes the actual thermal core, we do not know at the moment. We will try to find out but you can also contact ATN directly. Please let us know if you have any further questions.

From on

Q: What is your best price for an ATN Thor 640 2.5-25 thank you Blake

A: Hi Blake. How quickly do you need the thermal scope. If you are open to waiting we may be able to offer a larger discount. Please respond and we will get back to you with pricing.

From on

Q: Comparing the x25 model vs the x50 model there is a considerable difference between the detection/recognition/identification ranges between the two models. Is this solely due to the difference in their zoom/magnification or is there something additional internally on the x50 model that gives it the significantly greater distances? The sensor, core and other internals appear to be the same.

A: Hi Jason. The big difference is due to the size of the objective lens. In thermal scopes a larger lens allows for increased amount of information to be collected by the scope and provides greater range as a result.

From on

Q: Can the Thor scopes be used during the day, or are they only for night?

A: Hi Jeff. Most certainly, ATN ThOR like any other thermal riflescope can be used at any time of the day or night.

From on

Q: is the objective lens size on a thermal the same as a reg. Scope? Let's more light in? Also I'm going back and forth on the 320 and 640 for the atn Thor. Any guidance would be appreciated. Thanks y'all

A: Hi Michael. The larger the objective lens on a thermal, the more "thermal information" it is able to receive and process. This increases the effective range of the unit. as far as 320 vs 640 goes, it all depends on your specific application. Naturally 640 will provide a smoother image, however 320 is adequate for many hunting scenarios. If you provide some information on what you hunt and how far, we will be able to provide a more specific advice.

From on

Q: Has ATN came out with software update that bring the refresh rate up to 50Hz yet?

A: Hi Kevan. you can monitor their releases for all thermal and digital scopes and binoculars on this page: . Each update has details for what is included.

From on

Q: What is the largest caliber this scope can handle. Will is function properly on a semi auto 338 Lapua without messing up the scope? If not can you recommend another scope in a similar price range that will work better

A: Hi Luke. ATN ThOR-HD thermal riflescopes are rated for a .308 to my knowledge. We can certainly have a call and discuss other options if need be. Just let us know the best number to contact you at.

From on

Q: Is this still just 30hz or have they gotten it updated to 50 ?

A: Hi Keith. ATN Thor HD is still at 30hz at this point I beleive.

From on

Q: your ThOR-HD 640 2.5-25x50 is over 2000 $ more than one at optics planet , is this some special moder or what ?

A: Hi Goran. We were actually in the process of applying price updates released by ATN for this spring. However, the price OP is offering is significantly lower than the price ATN requires us to advertise. This usually means that they are cleaning out their inventory of display or returned units. In either case, we will certainly price match as we promise if you are interested in placing the order with us. We only have 1 unit left in stock at the moment so I do suggest placing the order ASAP if you are interested. If you pay via check or money order, we can even split the credit card processing fee with you which will save you a few more bucks.

From on

Q: Can you use a ir targeting Lazer like what the military has ? And I have the thor HD 5-50x100 . The scope has a 1913 rail on the left side for like a range finder . Do I need one for my scope ?

A: Hi Chris. Thermal scopes do not pick up IR light light night vision scopes do. In terms of a rangefinder, it all depends on how you hunt. We have lot of customers who do not use them and we have many who need longer range shots and don't want to guess on the ballistic adjustments.

From on

Q: Hola, primero, se puede disminuir el brillo del visor? Y segundo, hay una forma de standbay con bateria auxiliar, para no tener que encender la bateria, después la mira... demora como 20 segundos.. gracias

A: Hola. Ciertamente hay un control de brillo. No tengo muy claro tu pregunta sobre el modo de espera. El alcance tiene la capacidad de conectarse a un teléfono móvil. Me disculpo por mi mal español. Estoy usando Google para traducir.

From on

Q: Hola, no he podido calibrar la brújula, y me aparece CAL en la pantalla, hice como muestra el manual, girarlo en las tres planos del espacio y nada, pregunto... hay alguna configuracion especial, o hay que apretar algun boton? Muchas gracias.

A: Hola Mario Tendremos que contactar a ATN para ayudarlo aún más ya que esta es una pregunta muy técnica. También puede contactarlos directamente al 1-800-910-2862.

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