Outdoor Optics Scopes

Best Thermal Scopes – Review and Buying Guide (Aug 2021)

Thermal imaging scopes are widely used in the military and other protective agency services, especially in the areas of law enforcement, homeland security and defense, tactical military operations, anti-terrorism, border and coast patrol, nuclear and critical facility surveillance, and many more.

However, these high-tech optics are available for civilians as well that can afford them. If you’re always hungry for the thrill of hunting and night-stalking animals, you surely need one. But they don’t come cheap, do they?

We understand that you don’t want to make a bad investment. This is the reason we reviewed several thermal scope models and came up with a list of the best thermal scopes available today. This is your opportunity to make an informed buying decision and make your hunts more successful.

Top-rated 10 Thermal Scopes: Comparison Chart

Pick NameThumbnailProduct NamePrice
Overall BestPulsar Trail XQ50 2.7-10.8×42Pulsar Trail XQ50 2.7-10.8×42Check Price
Budget ChoiceATN ThOR 4, 384×288, TIWST4381AATN ThOR 4, 384×288, TIWST4381ACheck Price
Good Value for MoneytheOpticGuru ATN Thor-HD Thermal ScopetheOpticGuru ATN Thor-HD Thermal ScopeCheck Price
Great for Coyote & Hog HuntingATN ThOR HD 384 Smart Thermal RiflescopeATN ThOR HD 384 Smart Thermal RiflescopeCheck Price
Great for AR 15 RiflesATN ThOR-HD 640, 640×480ATN ThOR-HD 640, 640×480Check Price
Great for Military UseTrijicon Teo Reap-IR Mini Therma IRMS-35Trijicon Teo Reap-IR Mini Therma IRMS-35Check Price
7thATN Thor 4 Ultra Sensitive Thermal Rifle ScopeATN Thor 4 Ultra Sensitive Thermal Rifle ScopeCheck Price
8thPulsar Thermion XM Thermal RiflescopePulsar Thermion XM Thermal RiflescopeCheck Price
9thPulsar Core RXQ30V 1.6-6.4×22 Thermal RiflescopePulsar Core RXQ30V 1.6-6.4×22 Thermal RiflescopeCheck Price
10thFLIR Thermosight Pro PTS233FLIR Thermosight Pro PTS233Check Price

Why Follow Our Lead

Here at Ranger Expert, you’ll find a number of hunting and shooting enthusiasts that love the feel of accomplishment every time we make our hunting trips. But we do care about nature and wildlife and we encourage our readers to do the same.

Over the years we’ve noticed that hunting is something that requires progress in every season and the novice hunters make so many mistakes that a clan shot and a humane kill seem impossible for them. Even the most seasoned hunter may act like a novice when transferring from bow hunting to rife hunting.

Keeping these factors in mind, we established this platform where we share our trips and publish how-to blogs with tips and tricks so our audience can make the most of their hunting endeavors with the right knowledge and equipment. We also review different types of hunting tools that help our readers pick quality gear for optimum success.

Our Testing & Selection Procedure

We’ve a thorough product testing procedure that we’ve devised after a lot of trial-and-error sessions. This involves online research, hand-on testing, and consulting with other experts for their feedback.

Initially, we spent 18 hours in search of the most popular thermal scopes of today and identified 18 such models that we decided to test ourselves. It took us around 3 months to get it done when we considered factors like the range, magnification power, battery life, refresh rate, accessories, and sensor resolution of each model.

Based on our findings (we hunted hogs, coyotes, and varmints at night with these), we championed these 10 models. But that was not all. We got in touch with other expert hunters that we personally know to get their feedback and as expect , they too were quite postiive about the outcome.

So, there’s no doubt that this is the most in-depth review you will find on thermal scopes online.

Best Thermal Scope for Hunting: Top 10 Reviews & Rating

Still wondering what is the best thermal scope for hunting? We’re about to get there. Carefully go through each model and see which one fits you best.

1 Pulsar Trail XQ50 2.7-10.8×42 (Overall Best)

 Pulsar Trail XQ50 2.7-10.8x42

The Pulsar Trail XQ50 2.7 comes with high base magnification, with thermal imaging and precision positioning at incredible distances. Having a high refresh rate of 50Hz, the images provided are fluid, top-notch. With a 640×480 ice-free AMOLED display, it is able to detect heat signatures in the active detection ranges, on the longer side being 1350 to 1800m. It encompasses multiple zeroing profiles as also 10 electronic reticules. The additional feature of a Stadiametric rangefinder makes acquiring the target simple. It boasts three operating modes; City, Forest, and Identification. The external battery pack, extends the life to 20 hours. The design is both functional and ergonomic. It sports a user-friendly interface.

The option for three different zero calibration is available on this scope individually for the three different Modes City, Forest, and Identification.

After having tried out the XQ5o and XQ38, we tried out both the models first. We were won over and impressed by the ease of use.

The UI is clean and the design is intuitive, with an unbelievably clear image along with the means to tweak contrast and brightness on the fly.

Full marks to the absence of any lag for quick scanning. The picture-in-picture feature renders hog hunting a song. Take shot, pick next, take shot. Nailing hogs running at full speed is no easy task. Many optics don’t fare so well, have a jumpy image, sway or glitch. The Pulsar XQ50 image processing is second to none for the money.

When we tried out the 50 and 38 for image clarity, they turned out basically the same. The objective size, field of vision and magnification are correlated. Smaller objectives will have a less base magnification and a greater FOV at short distances. Larger objectives have a larger base modification and a greater FOV at short distances.

Another of our experiences with the QF is that the built-in rangefinder which determines the range based on the size of the animal tends to be inaccurate as compared to laser ranging.

We also did try it out in different weather conditions; fog, rain, sleet and snow, without a glitch. The average Joe can now get his hands on professional quality imaging.


  • One-shot zeroing with freeze function
  • Picture in picture function
  • Stadiametric rangefinder
  • Defective pixel repair function
  • Built-in 3-axis accelerometer, gyroscope, magnetometer


  • Expensive

Our Verdict

Our unanimous decision to crown the Pulsar Trail XQ50 as Overall Best was propelled mainly by its ‘no-nonsense’ attitude. The configuration of sensors, components, refresh rate simply unearth the target even in the densest of cover, place the target well etched, in sharp contrast and early enough making it a child’s play to nail it. This is a phenomenal quality scope. Period.

2 ATN ThOR 4, 384×288, TIWST4381A (Budget Choice)

ATN ThOR 4, 384x288, TIWST4381A

ATN’s Obsidian IV Dual core boasting nextgen Thermal Sensors powers the ATN ThOR 4. Its heightened thermal sensitivity, enhanced contrasts, smooth shutter, and boosted resolution makes the refurbished ATN 4 user-friendly and swift to learn.

Your shot will count every time and hit the target. The Ballistic Calculator- Target Angle, Temperature, Humidity, etc., are factored in for those professional long-range shots.

The ThOR 4 is capable of Dual Stream Video Recording; to your smartphone and simultaneously the SD card.

The RAV automatically starts to records prior to and after shooting.

Our experience with this optic has been just great. Agreed, it takes a while to get used to the menus and the unit is on the heavier side, but it is a well-built piece of equipment.

We were much endeared of the one shot zero function. It is a game changer. Now you don’t need to shoot half a box of ammo to get it perfect.

Most users we spoke to were absolutely enthralled and so are we. The clarity is crystal clear.

After adjusting the settings taking ambient conditions into reckoning, we could spot deer at 500m clearly.

This optic maintains zero without wandering off.

We tried out the mounting by siting it on the 450 Bushmaster and a 300 AAC. It was a simple exercise and moreover, the 300 AAC was stored when the mount was shifted back to the Bushmaster.

As is sometimes the case, a few complaints were regarding tardy customer service offset by eulogies regarding the service.

Also nothing unusual in this, but we found it gets a bit blurry when zoomed all the way.

Overall this is an impressive optic and comes highly recommended.

One thing you should not forget is updating the firmware regularly.


  • Ballistic Calculator
  • Smooth zoom
  • Built-in smart rangefinder
  • Excellent Image performance
  • High-resolution video recording


  • Expensive
  • Uses disposable batteries
  • A little heavier than expected

Our Verdict

This is our best budget thermal scope not because it is inexpensive but for the huge array of features it comes with for the money. The large range of selectable reticules and the panoramic display with the option of going two-tone is enthralling. Its performance in inclement conditions be it the heaviest rain, or dense fog, the target is detected with great ease and is a sitting duck. It is designed for heavy-duty and the range of add-ons leaves nothing to be desired. This high-tech, low maintenance optic is one of the best in the market today.

3 theOpticGuru ATN Thor-HD Thermal Scope (Good Value for Money)

theOpticGuru ATN Thor-HD Thermal Scope

The ATN ThOR HD 640 pushes innovation to the 21st century. It has particular night vision capacities. The ATN ThOR HD 640 Smart Thermal Riflescope runs on an Obsidian Core which can crunch immense records without breaking a sweat.

This thermal scope doesn’t inconvenience you with complex outlines, mini-computers, or reticles. It is the simplest extension. The ATN Obsidian Shooting Solution deals with all the intricate estimations.

The Recoil Activated Video records the video as the trigger is pulled. The rangefinder does practically everything for you almost the same as rangefinder binoculars. Just point on the objective to get the vital readings. The degree highlights astonishing ergonomics and accompanies an E-Barometer, Gyroscope, E-Compass, and Bluetooth and Wi-Fi included as well.

We took time out to get a firsthand account of this scope and our first finding was that take the time to read the manual and practice a bit. It is everything the manufacturers claim it is.

Another thing instantly evident is the 30 Hz processor. It does not track moving targets well enough and also presents ghost images. As expected it’s really not fast enough for moving targets. Do go in for the 60 Hz processor.

We tried out a 3-year old model without the gimmicks the new ones come with and came away blown over with its consistent performance; it functions perfectly for regular deer and hog hunting. The view was clear, bright and adjustable. It turned out to be amazingly sturdy without damage or degradation in quality of viewing. The reticle holds true when dismounting, mounting the scope for cleaning.

Another noteworthy observation of ours is the superior night vision of this optic. Also the number of features on offer can be a bit overwhelming at first but once familiar, it’s a real beaut.


  • Thermal Vision
  • Ballistic Calculator
  • Profile Manager
  • Smart HD Channel
  • E-Barometer


  • Takes a little practice
  • Uses disposable batteries
  • Opt for external battery pack accessory

Our Verdict

We give it 5 stars hands down. This thermal scope calls for a bit of reading and some practice to perfect it. The WiFi gives others the opportunity to share the experience by viewing the action on their smartphones. Another feather in its cap is its durability. We found it can withstand a fair amount of beating. With its innovative technology and the goodies thrown in, our Good Value for Money award is not misplaced.

4  ATN ThOR HD 384 Smart Thermal Riflescope (Great for Coyote & Hog Hunting)

ATN ThOR HD 384 Smart Thermal Riflescope

ATN Thor-HD 348 is a soperb thermal rifle scope. Smart HD Technology puts this scope on a different platform than the competition. .

Recoil Activated Video (RAV) permits recording all your sessions.

The rangefinder is built-in will make things easier. It calculates distance, so a perfect shot is gauranteed every time.

Recording your forays is a simple deal using the SD card without the need for any extra USB cables.

Our take is that it is a great scope for short range game hunting.

Much the same as with the durability factor, the 384 and 640 have basically identical extras; Video modes, Wi-Fi, and streaming are a part. The ballistic calculator and smart rangefinder are mirrored. Truly, the main contrasts here that can be an issue is power. If you are within normal shooting distances, the ATN HD-348 is your buddy.

When comparing the contrasts between the 640 and the 348, we found the 348 lagging a bit it came to the cost. To save money and still hunt for a bargain in getting a sturdy, usable optic, you should home in on this scope.

Contrasts are absent between the two siblings with regards to sturdiness. It can deal with the entirety of harsh conditions and temperatures. They won’t haze or be harmed from water and can deal with impacts as far as possible to the biggest non-magnum ammo.

We tested it in daytime when it was rather hot, the paper target was vividly visible after 30 minutes.

We did notice some minor screen interference with the WiFi. Also spectacle users found the eyecup design requiring one to remove glasses.


  • Obsidian II Core
  • Smart zoom
  • Multiple reticule options
  • E-Compass, E-Barometer
  • Smart Shooting Solution


  • Expensive
  • Eye cup design could be more user-friendly
  • Shooting at larger ranges difficult

Our Verdict

We found this thermal scope to be an excellent choice for the beginners. The reason number one is its battery life that would allow them to use it for a long time, not to mention that newbies miss on targets more often. The second reason would be that you can see the target in dim light at even a range of 200 yards without any problem.

Nonetheless, the Smart Thermal Riflescope lives up to its image and truly is extremely well suited for hog and coyote hunting besides other vermin and foragers. It comes with a host of extras and for its price is a real performer.

5  ATN ThOR-HD 640, 640×480

ATN ThOR-HD 640, 640x480

This Thermal Imaging Scope can, be it day or night, pickup and recognize your prey.The ATN core performs superbly. Utilizing the amazing Obsidian Core & UI, the ATN ThOR-HD is designed to operate as a state-of-the-art computer. Throw in a ballistic calculator which compensates for the trajectory of the bullet. Feed your wind readings to the Smart Range Finder and the Core leaps into action. Armed with RAV and a smart rangefinder, you can use this scope for taking down big game in low light conditions.

Our research dug out that the mounting method is a poor choice. The focal lens sits too low to get a good sight picture without resorting to an awkward angle. The natural sighting looks at the bottom right corner of the internal screen. This was tried using the same mount on four different rifles with the same result.

It was appalling to see the quality of the packing case which was merely a cloth satchel, hardly befitting for a $2500 optic. Also the serial number is an affixed sticker which will disappear in a few months and then you are in hot water to make warranty claims.

The menu can swamp you unless you are using it a lot. We also saw that recalibration is necessary frequently. The factory mount is poorly made. We recommend to replace it with a ‘return to zero’ picatinny mount that works wonders.

The NUC process which recalibrates the image to compensate for changing environmental conditions, needs to be done frequently, which though annoying, is quick and easy to do.


  • Smart Shooting Solution
  • GPS Geotag GPS
  • Electronic Compass
  • Microphone
  • Durable construction
  • Quick release mount


  • Grainy view
  • Ghost images
  • Poor mounting
  • Cheap accessories

Our Verdict

Everything works as advertised. The image is outstanding, crisp and clear though some users have a complaint here. This robust device can handle heavy, harsh conditions without a whimper. The first time set up may throw you off but you are ready for takeoff once you have your profile and zero. So, head downwind and engage those boars instead of merely spooking them. Prepare your gear and grab the best thermal rifle scope without further dilly dally and nail those pests.

6  Trijicon Teo Reap-IR Mini Therma IRMS-35

Trijicon Teo Reap-IR Mini Therma IRMS-35

One cannot but embrace Trijicon product because they manufacture quality products despite their late entry into thermals.

The REAP-IR is made to military specs and comes with the new stadiametric rangefinding technology providing a 12° degree field-of-view lens.

What makes the REAP-IR ideal for military, security, and night hunters? The 2.5x magnification coupled with the 640×480 resolution and a whopping 60 Hz frame rate. A target, no matter how swift stands little chance against this lethal combination.

It is also the most robust be it desert conditions or those of urban streets.

Extras were not a predominant design concern but the Reap-IR has a few handy ones chief among which is the integrated rangefinder. This is linked to a readout reflecting where the reticule is pointed.

In our quest for understanding the performance, the first thing that struck is the versatility.

A bonus is in the choice of just outlines highlighting targets so that your night vision is not messed up. As a dedicated weapon scope only, it cannot be used as a clip on.

What we feel is a major setback is that the controller thumbstick is positioned not on the top but to the right, a huge disadvantage for left-handed shooters. It is also over-sensitive making it difficult to choose an option correctly.

About the much touted picture quality, we saw for ourselves that it was indeed crisp and clear to perfection.

Our disappointment was the trade-offs to sacrifice weight. The focusing ring was done away with and you can’t get a sharp image closer than 5 yards.

The second drawback is that there is no internal shutter. Recalibration of the thermal sensors is required frequently as the unit warms up or cools down.

The use of small CR123 batteries is limits use to 3-4 hours.


  • Stadiametric Rangefinder
  • Edge Detect Mode
  • Reticle Position Readouts
  • ETR-Enhanced Target Recognition
  • 5 Reticle Patterns
  • Perfect image
  • Flexibility


  • Eye protector slips off
  • Expensive
  • Thumbstick oversensitive

Our Verdict

This is a foregone conclusion. User reviews we got were all out overwhelming in praise of the Reap-IR. Shipping was quick and performance promises all held up. The image quality is exponentially better for tactical purposes, thanks to the 60Hz frame rate, a fast-moving target poses little difficulty. With so many features packed in, this is one can’t do without scope.

07 ATN Thor 4 Ultra Sensitive Thermal Rifle Scope

ATN Thor 4 Ultra Sensitive Thermal Rifle Scope

Pumped by Dual core ATN’s Obsidian IV next generation thermal sensor, the ThOR 4 is unmatchable when comes to accuracy under pitch-black darkness. ATN introduced improved thermal sensitivity in this particular scope that brings better contrast and higher resolution. The noiseless shutter makes the hunting game more interesting.

We found the scope to be of a traditional design yet packing cutting-edge technical wonders e. g. the ABL laser can superbly pinpoint long-distance targets and channel the data to a built in ballistic calculator using Bluetooth. That does all the reticle POI adjustments within a matter of seconds. The whopping 20000mAh battery pack provides enough juice to run the device smoothly for 22 hours. Perish the thought of misplaced chances due to drained batteries.

We were simply bowled over with this optic when testing it. It has plenty of refinements that work both for the beginners and pros.

We couldn’t but love the remote controller labeled as ATN X-Track. The name is suitable because it does give you the options for tracking the rangefinder and ballistic calculator. What’s more, the ATN Quick Detach Mount helps you manage the profile of your scope easily.

There’s a superb Dual Stream option for video recording and once recorded, the files can be easily be streamed to smart phones in HD. You can simultaneously save the video to an internal SD memory card.

It’s a super intuitive device and we were able to learn how to operate it fast. ATN offers a 3-year warranty on this best rated device that comes at under 5000 USD.


  • Ultra-sensitive Gen 4 Thermal Sensor
  • Ballistic Calculator
  • Video recording and dual stream
  • Records video into Micro SD card and streams on smartphone
  • Quick ATN Detach Mount
  • Remote control (ATN X-Trac)


  • SD card insertion is difficult and often gets ejected due to a rubber cover

Our Verdict

In the world of thermal optics, it is almost unheard of that the battery can last 16 hours of uninterrupted service. This is definitely ultra-low consumption. The recording directly into a MicroSD card is another welcome innovation. The ATN ThOR 4 has stolen our hearts and we heartily propagate our findings as the optic to watch out for.

8 Pulsar Thermion XM Thermal Riflescope

Pulsar Thermion XM Thermal Riflescope

Sticking the traditional riflescope, standard 30mm ring, and scope mount platforms provide the perfect mounts for The Pulsar Thermion. Utmost durability to IPX7 waterproof rating (can withstand submersion in 3 feet of water for 30 minutes) and a housing of magnesium-alloy provides rugged and well-founded, all-round performance. From under 1000 yards away, it renders perfect heat-signature imaging on a full-color 1024×768 HD AMOLED display.

The resolution is 320×240 with 12m pixel pitch, PIP, 8 color palettes and 15 reticles. Audio is blended Integrated still image and video recording with Pulsars Stream Vision App. A magnification range of 3.3-13.2x and a 50 Hz frame rate is a game changer. .

The refresh rate is awe-inspiring and you’ll be spoilt for reticle choice. The recording is recoil triggered and hassles free. In comparison, other optics pale.

We all unanimously agreed that this scope gets you the biggest bang for the buck. It has internal recording and one of the two batteries can be removed so that the battery can be changed without the scope turning off. The mounts offer great leeway. Anything with 30mm rings can be used. You are not restricted to one or two options only.

A word about the scope. It is sighted in for long-range shooting with unreal clarity for a 384 sensor. The digital zoom imparts a highly comfortable magnification level for both hunters and target shooters

It is quite durable and we tried it out in close 100% humidity without a glitch. We agree that from functionality to accuracy to weight, it is top of the shelf.


  • IRIS technology increased recognition and detection software
  • One-shot zeroing with freeze function
  • Picture-in-picture digital zoom
  • Defective pixel repair feature
  • 5 rifle profiles with 50 zero slaves


  • Poor battery life

Our Verdict

Very hard if not impossible to get for your dollar. This thermal scope review is heading only one way. This mouth-watering spread of sheer functionality, high performance and quality has us spellbound. Beating this package in an optic is light years away for the competition. A great show, a stellar product.

9 Pulsar Core RXQ30V 1.6-6.4×22 Thermal Riflescope

Pulsar Core RXQ30V 1.6-6.4x22 Thermal Riflescope

The civilian market is the primary target for Pulsar thermal scopes. The high-end features that Pulsar incorporates on their flagship models vis-a-vis contrast presets, picture-in-picture zoom, external power supply capability, 50 frames per second, one-shot zeroing, and a range finder, built-in. The 8x zoom gets you on the target in a flash.

A unique, distinctive feature of the Pulsar Core RXQ30V is the presentation of heat signatures in a green sapphire tint. A 50 Hz refresh rate with a 640×480 AMOLED display delivers high-resolution thermal images. This optic reveals three modes of operation; forest, rocks, and identification to guarantee peerless pictures for your environment. Human-sized heat signatures at 900m are unveiled by the glass-nylon composite Core.

What we found on inspection was there was no recording facility. There was no practical way to adjust elevation and the zero was fixed. However, you can choose a reticle.

The battery pack itself is not a standalone power supply. The equipment comes with an adapter that fits the battery pack. The two batteries will last around 5-6 hours. An amazing optic. Can see targets clearly up to 200 yards. However, reticle doesn’t change color when hovering over a hot object.

Some users claimed screen freezes but that is due to improper sensor calibration. It has three modes; Off, Manual and Automatic. Keep it on manual and all problems should go away.

We also discovered that newer models have dumped the sapphire tint and reverted to black and white. Further investigations revealed that users have found the green tint bothersome. We probed for how much recoil can it take and found it was rated for 6000 joules which is quite a lot.

The thermal scope mounting is good we discovered as long as it has a picatinny rail, will fit on any gun.


  • Green Sapphire display
  • 50 Hz Refresh rate
  • Variable magnification
  • User interface for menu/ settings
  • Durability
  • QD mount for movement from handheld to weapons mount


  • No ranging capabilities
  • Objective focus

Our Verdict

For the price, this optic qualifies for the cheapest thermal scope hands down. We, however, find no cutbacks or compromises in the product. In fact, it is a marvel how the bundle of goodies remain undiminished. A point in question, a 50 Hz refresh rate. Let’s not waste time, go fetch yourself the best thermal scope for sale before stocks run out. Simply a stellar buy.

10 FLIR Thermosight Pro PTS233

FLIR Thermosight Pro PTS233

FLIR’s offering in thermal optics of today is the provision of the most explicit and crisp imagery. It has the ability, be it by day or night, to zero in on your targets. The clarity and image quality of this low cost thermal scope which is boosted by the ultra-fast 60 Hz refresh rate and completely eradicate pixelation. This affordable, compact scope is a perfect fit for deer hunting, scouting, and even professional use.

Even at this budget price point, it can record 2.5 hours, that is 1000 images, is possible accompanied by multiple color palettes and reticle choices. The range finder comes built-in. The best part is the lightweight scope, under 1.5 pound.

The aluminum aircraft-grade compact housing shields a FLIR Systems Boson core with a pitch sensor. For enhanced situational awareness, it has an industry-leading on-chip video processor.

We found this optic amazing all round. Target detection through smoke, haze, fog or rain. Absolute clarity on a high-resolution display.

The integrated digital compass and inclinometer guarantees precision range and target orientations.

Our research finds that FLIR has upgraded this model to a 60 Hz processor that makes it formidable for fast moving targets.

This scope too has one drawback in that it crams in a lot of features. Not that this affects performance, only more time to read up and understand.

An oft repeated grouse was the poor documentation in that not well explained. Hopefully the manufacturers are taking heed of this as a proper manual is a huge necessity.

A more serious drawback is the all too frequent freezing of the system requiring restarts.

The view finder appears narrow and the field of vision small. Enhancement of eye relief too is wanting. Image quality is a little wanting at higher zoom levels but that is expected.


  • Exceptional Night vision
  • FLIR Boson camera core
  • High-resolution FLCOS display
  • Shot activated video recording
  • Internal storage of up to 2.5 hours of recording or up to 1,000 pictures
  • 3″ eye relief
  • Digital compass and inclinometer
  • Aluminum alloy body


  • Documentation unclear in places
  • Freezes at times requiring a restart
  • No audio

Our Verdict

This is the cheapest thermal scope on our list. Some users have had issues with image clarity subsequently set right by FLIR under warranty. Truly that is an exception rather than the rule and we are open-mouthed at this mind-boggling feast of features for the money being shelled out. This top-rated scope is well suited for hunting, scouting and even professionals vouch for it.

Why Use A Thermal Imaging Scope

armasight thermal scope

Thermal weapon sights and scopes find their application in a number of fields.

  • Operations concerning military and sniping
  • Enforcement of law
  • Hunting
  • Observation of wildlife, such as for census
  • Target surveillance
  • Concerns regarding security
  • Navigation in piracy infested waters
  • Detection of hidden-objects
  • Entertainment

To be one up on the game of their choice, quite a few hunters are looking up to thermal imaging systems. Most predators are nocturnal by nature. In this scenario of darkness, for successfully hunting them down, one should be able to see through the dark.

In many states, wild hogs have become a nuisance and hog hunting is encouraged by the states. A regular hunting scope fails in certain conditions like coyote hunting, hogs hunting, hares hunting and more. To successfully bring them down in dark, you need to be equipped with a good thermal scope to boost your abilities by allowing you to get close enough to your quarry undetected.

Vermin eradication is another big ask. Coyotes steal foal and small livestock while hares devastate vegetable gardens. Coyote hunting and shooting down hares often require thermal hunting scopes.

Budget-friendly options do exist, but research thoroughly before buying one as the less expensive options sacrifice some features or capabilities to snip costs.

If you are an avid hunter, it is worthwhile to invest in an affordable thermal scope. These can be used by day where natural conditions like fog could conceal visibility.


Are you going to be hunting in thick brush or where fog is likely to be encountered? Thermal vision scopes work best in these surroundings. If temperatures are close to freezing, this affects the amount of radiation. Night vision scores better here.


If you are hunting in a mountainous area, where the light is diffuse, thermal optics fit better.

Overall, thermal imaging scopes work in both day night conditions, producing images by tracking residual heat. They are expensive, heavier, produce less clear images. In low temperatures, image quality is compromised.

Types of Thermal Imaging

a) Un-cooled Thermal Imaging

A cryocooler is a device that lowers the temperature of the sensor to cryogenic levels. This eradicates thermal noise levels below that of the signal from the scene imaging. Simply put, in un-cooled thermal imaging, the imaging sensor does not require cryogenic cooling. The detection system relies on a microbolometer, a built-in chip with a large temperature coefficient. On-scene changes in temperature are detected, converted into electrical signals and processed into images.

Uncooled sensors are designed to function in the same wavelength as that of the temperatures related to infrared energy released by terrestrial targets. Uncooled cameras work uninterrupted for longer periods. They are unsuitable for long-range, exceeding 5 km.

b) Cryogenically Cooled Thermal Imaging Systems

Cryogenically cooled systems have the imaging sensor integrated with the cryocooler that cools it down to 0℃. They are ultra-sensitive, picking up minor temperature variations. When it comes to long-range use, they are well matched. Brilliant image resolution results. Also, their thermal contrast is high which means that they can detect targets even if the background is close to the target temperature. The flip side is that they are expensive and need servicing every 2 years.

Best Thermal Scope Reviews – Buying Guide

Within the last 30 years, there have been some amazing leaps in night-vision technology that have become available to the civilian market. A thermal vision riflescope is fundamentally a scope that has a compact thermographic camera along with an aiming reticle. It makes you clearly see your prey no matter how dark the surroundings are.

The thermal imaging technology has recently been increasingly accessible to the average shooter and they’ve never been better than they are right now. But choosing the right thermal scope can be a very tedious job. And trust me, you’ve got to have some basic ideas about these scopes, how they work, and what features to target.

1. Price

Thermal scopes are indeed not inexpensive. That is because they are a specialty item. The demand for mass production of the microbolometer sensors isn’t there. The components used embrace high-tech and the value could be brought down if high volume production was viable.

If you can’ afford a thermal scope, try a night vision scope like the BESTSIGHT Digital Night Vision or a thermal viewer like the Leupold LTO Quest Thermal Viewer. They won’t give you that amazing experience, but they may help you get your job done to some extent without having to break the bank.

There is also the mid-range Trijicon ACOG 4 X 32 Scope Dual Illuminated Chevron .223 Ballistic Reticle where ACOG stands for Advanced Combat Optical Gunsight. It features a dual-illuminated reticle to work fine in low or no light considitions.

On the other hand, if you’ve enough money and want to enjoy an unforgettable night-hunting experience, the Trijicon Reap-IR, 60mm, Black is at your service. Coming with a $9500 price tag, this is probably the most expensive thermal scope out there!

2. Magnification

Magnification power in thermal scopes can range from 1x to 16x and greater. These scopes have a reliability range of 300 yards, so a magnification power greater than 3x is somewhat redundant. Keep in mind, the more you zoom, the smaller the field of vision gets. Digital zoom can cause less clear images. Figure out how far you plan to be shooting and the picture quality you desire. You can then determine how far your magnification needs to be.

3. Sensor Resolution

The paramount features of a thermal scope are the screen resolution and refresh rate. Never matter how great your sensor is or how far your zooming capabilities are. Your scope will be rendered ineffective if the image is not crisp and clear enough.
Higher refresh rates and better screen resolution will output clear, crisp images. Carefully select your scope bearing in mind the quality of the image presented.

4. Range

Range and magnification go hand in hand. The thermal detection array’s sensitivity can detect thermal radiation at fair distances. In this way, you can see your target approaching whilst you get into position for a good shot. Most scopes can give you a range of 1000 yards and above, a moderate scope costing under 2000 USD around 300-500 yards. Seasoned hunters will settle for either since taking a shot at 200 yards is the norm for a surer shot and a night hunting safety precaution.

5. Durability

Like it is for any outdoor equipment and tools, guns are subjected to dust elements, moisture, fog, heat, and cold, meaning there’s no alternative to taking care of it. For thermal scopes, they are even more sensitive to such factors for being high-tech and prone to damage under harsh conditions. This is why they need to be taken special care. Banging and rough handling might damage the sensitive internal precision parts under the hood. It can cause misalignment and imperfect performance, in the worst-case scenario, rendering it totally useless. So, the durability of the scope depends a lot on the user and the manner it is used.

6. Extras

Understandably, thermal scopes with rangefinders, inclinometers, and GPS are acceptable. The desirability of Bluetooth and Wi-Fi to stream to a smartphone is your choice. Only weigh the extra cost you will be incurring.

A useful extra is the bullet drop compensator (BDC). Your rifle is zeroed for a particular range, typically 100 yards. The possible drop in the bullet for that range is compensated for when you fire. Suppose your target by your estimate is 300 yards away, just aim using the 300-yard reticule and press the trigger.

7. Battery Life

Battery life is usually restricted to 5 hours and above. Some operate on disposable batteries and some can be recharged.

8. Refresh Rate (30Hz Vs 60Hz)
The refresh rate as pointed out earlier plays a pivotal role in the image quality delivered. Most of the thermal imagery scopes available today fall under the 30Hz or 60Hz category. The figure denotes the number of times the image is refreshed in a cycle. The higher the refresh rate, the more lifelike is the image. It is therefore recommended to go in for a scope that provides a higher refresh rate.

Thermal Imaging Hunting Tips

best budget thermal scope

  • The cardinal rule of hunting is to hold your shot. Most of us give in to the excitement and enthusiasm and press the trigger. This has sometimes cost dearly. It after all only takes a second to get your identification of the target correct and that it is a critter or a varmint you are seeing through your scope. Go for the trigger then.
  • You need to give yourself a little time to set up your optic, It has to warm up, calibrate itself, you need to make adjustments for wind on the Ballistic Calculator, etc. before you pull on your boots.
  • Make use of your smartphone by streaming your view onto it. It acts as a second pair of eyes and is also a cross-check to verify your observations.
  • The Law. Be well versed with laws governing hunting. Is it allowed after dark? What can you bring down? Not all animals are allowed to be hunted. What is the bag limit applicable? Laws also vary from State to State.
  • Check your zero regularly. That one single parameter sets up your device. If it wanders off, bring it back or your efforts won’t pay.
  • Take good care of your scope and repair it immediately if you notice any issues.

Wrapping It Up

We believe that with our detailed thermal scope reviews and buyer’s guide, you’ll make an informed buying decision and buy the best thermal scope to get real value from your investment. For example, the Reap-IR seems to be a jack of all trades, the ATN ThOR 348 especially for hunting and so on. But readers should invest their time in reading up more and objectively arriving at their choice. Engage other owners for first-hand tips and pointers.


Q. 1: Which thermal scope is employed by the military?

Ans: The AN/PAS-13 is the thermal scope currently used by the US Military.

Q. 2: Can a thermal scope penetrate walls?

Ans: No, they cannot. Even glass is a barrier, no matter you’re using the white hot or black hot or iron hot or rainbow or any other setting.

Q. 3: Is daylight use possible with a Thermal scope?

Ans: Yes. In daylight nothing hinders using a thermal scope. Sometimes when it gets warmer, it can get a little trickier but is still possible.

Q. 4: Is seeing through fog with a Thermal scope possible?

Ans: Yes, most thermal optics can see through fog, smoke, and rain.

Q. 5: Can thermal scopes be financed?

Ans: Yes, you can finance a thermal scope. Many financial institutions will finance anything. Amazon has a financing scheme too.

Q. 6: Can a crossbow be fitted with a thermal scope?

Ans: Yes. Most of the quality Crossbows can be successfully fitted with thermal scopes. Though they are not meant or configured for crossbow mounting, they do work, especially the ATN series.

Q. 7: What is the life expectancy of a thermal scope?

Ans: That is a determinant of how often and how long you use it. The thermal cores come with a warranty of 10 years. That would be the average lifespan of a thermal scope.

About the author

Erik Himmel

A Part-Time Firearm Instructor

Hi, this is Erik. We all know firearms are dangerous, but only when one doesn’t know how to use and care for them. I have 15+ years of experience with different types of guns and for the last 10 years, I have taught numerous people how to hold and shoot a gun while staying safe and keeping the surroundings unharmed. My neighbors are some of my biggest admirers who enjoy talking to me about their guns, firearms safety and maintenance.

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