Our review of the Flir TG275 thermal camera. (2022)

The Flir TG275 is a thermal camera that was designed for automotive diagnostics specialists. But how good is it and how does it compare to other cameras? Find out in our in-depth review.

PROS: Exceptional image quality high thermal sensitivity and ability to measure a wide range of temperatures, IP54 waterproof and dustproof.

CONS: Color LCD screen could be bigger.

(Video) The Perfect Thermal Camera for Automotive Professionals | FLIR TG275

Our review of the Flir TG275 thermal camera. (1)

ProductTypeResolutionBattery capacityWaterproofLCD screenPrice

Flir TG275

Our review of the Flir TG275 thermal camera. (2)

Handheld160 x 1205 hoursYes2.4″Click for more info

Flir TG275 Specifications

Resolution160 x 120
Pixels76800 pixels
ConnectivityUSB-C, Bluetooth
Temperature range-13°F to 1022°F (-25°C to 550°C)
Accuracy+/- 1.5 ° C
Thermal sensitivity0.07° C
Storage TypeInternal 4 GB
Battery capacity5 hours
Dimensions8.3 in x 2.5 in x 3.2 in
LCD screen2.4″
Refresh rate8.7 Hz
ApplicationsDesigned for Automotive Maintenance/Repair Professionals. Roofing, Electrical Inspection, HVAC
View Angle57° x 44°
FeaturesWaterproof, Dustproof, Manual Focus, Visual Camera

Flir TG275 – Specs & Review

The Flir TG275 is a handheld thermal camera specifically designed for the automotive maintenance and repair professionals for an affordable price.

The device features IGM (Infrared Guided Measurement) and the idea is that this diagnostic tool combines non-contact temperature measurement and thermal imaging to help you spot potential faults and troubleshoot faster.

(Video) Flir TG275 Thermal Camera For Automotive Diagnostics Overview

So what can you detect with this camera if you work in automotive repair? Overheating issues, Cooling issues, areas where the wiring is overheating and also relays and switches, leaks, issues in exhaust manifolds and also engine misfires (The cylinder that is misfiring will be colder). Technicians have pointed out that they quickly find the source of the problem and thus this automotive tool speeds up the repair process. This camera takes you beyond the limitations of single-spot IR thermometers showing you a full picture of what’s wrong under the hood.

And it is not limited to just the engine and the drive train because it makes it easier to diagnose if a brake caliper is locked up by measuring the temperature of the calipers on both sides of the car.

The Flir TG275 automotive diagnostic thermal camera has USB-C connectivity but also Bluetooth. On the back of the infrared camera you will find the 3 components: An infrared sensor, a visual camera (basically a built-in digital camera) and an LED light. And then there is an additional laser pointer on the back which points to the spot that you will be measuring. The camera start-up procedure takes about 12 seconds until you can capture the first thermal image. Once you’ve captured the thermal image you can send it to your phone via Bluetooth and the Flir Tools app which you can download from the Play Store or App Store depending on whether you are using an Android smartphone or an iPhone.

There are a few color palettes to choose from: Rainbow, White Hot, Black Hot, Arctic, Lava and Iron. You don’t get the rainbow high-contrast which we like on the Flir C5, but the Rainbow palette on this device has really good contrast. You can do basic image adjustments, set the brightness of the color screen, you can set it for Auto Power Off, turn the laser on or off.

Of course the standard settings are there like language and also the temperature measurement units (Fahrenheit or Celsius)

Flir TG275 – Thermal imaging quality

The first thing that you will notice when you point it towards a car engine is the amount of visual detail to thermal images making it easier to distinguish heat-related problems and spot issues. Everything is extremely clear.

The Flir camera uses its MSX technology to intelligently blend the visuals from the digital camera with the thermal readings from the Infrared sensor. Flir’s patented MSX enhancement adds sharp visual details and in practice, it really works and delivers superior image quality to what you find in other thermal cameras.

(Video) Hands-on with the FLIR TG275 Thermal Camera for Automotive at CES 2019

The IR resolution of the Flir TG275 thermal camera is very high. With a 160 x 120 infrared resolution, the Flir offers 19,200 true thermal pixels in total. While this 19,200 pixel thermal resolution is below the average pixel count that you get with similarly priced handheld thermal cameras, it compensates with the MSX image enhancement.

The refresh rate of the IR sensor is the maximum that you can get with a 9Hz frame rate. This thermal camera for automotive specialists has no manual focus mode and manual focus is not available in this price range for any thermal imager.

Flir TG275 – Temperature Range, Accuracy

Thermal sensitivity is on par with the average camera in this price class, with a 0.07° C sensitivity. Just in case you are not familiar with what the sensitivity represents, it is the minimum change in temperature needed to trigger a change in the measurement device.

It has the widest temperature range of any competing camera by far, with a low point of -25 degrees. That’s good but it is not impressive, however the higher end of the range is: 550° C. The full thermal scope of this camera is from 25 to 550 C ( 13 to 1022 F). This means that you can use it in extremely high temperature environments. It will work on petrol engines and diesel engines without a problem.

You can even use it to spot when a fire is about to start when the temperature is about 500 degrees. After the fire is visible however it gets out of the range quickly.

The accuracy is also superior, with a +/-1°C temperature measurement accuracy. This is lower than the 2 degrees standard we are used to. Accuracy is basically the device’s precision and sometimes confused with thermal sensitivity. A device can be highly imprecise but also paradoxically have a high thermal sensitivity. The viewing angle is standard however at a 57 by 44 field of view (FOV).

Flir TG275 – Battery life & Memory

The Flir TG275 automotive diagnostic thermal imager comes with a generous internal memory in the form of 4 GB for storage. It doesn’t sound like much but it can hold up to 50,000 thermal images with all their radiometric data. That means the temperature for each pixel is stored separately.

(Video) Work Smarter, Not Harder with the FLIR TG275 Thermal Camera for Automotive Diagnostics

The battery life is great, with 5 hours of continuous usage. Although the bar has been raised lately in battery life, we think 5 hours should be more than enough unless you are doing thermal imaging all day. The battery charging time is also 5 hours for up to 90%.

This thermal vision camera has a rugged and reliable design with an IP54 enclosure that protects it, which means it is waterproof to an extent and the enclosure protects the camera from dirt, dust and oil. It can easily withstand splashes and is designed to withstand a 2 meter drop.

A 2.4 inch screen is mounted on the camera. We think the color screen could be bigger, but nevertheless it is usable.

This camera is perfect for automotive specialists and it was designed with automotive applications in mind, but you can use it for checking leaks in plumbing, inspecting electrical wires and PCB circuit boards, you can check body temperature, you can see if your chimney is working properly or if your pet has a health issue.

In the package you will find the camera, a pouch, a USB cable, user manual and for some reason a thank you letter.

Flir Systems gives you a 2-year warranty on this camera for automotive diagnostics and their usual 10-year warranty on the Infrared Sensor.

Along with infrared cameras, Flir also makes moisture meters, clamp meters and a current probe as accesories.

(Video) FLIR TG267 put to the test #noaffiliatelinks


Our review of the Flir TG275 thermal camera.? ›

It has the widest temperature range of any competing camera by far, with a low point of -25 degrees. That's good but it is not impressive, however the higher end of the range is: 550° C. The full thermal scope of this camera is from 25 to 550 C ( 13 to 1022 F).

Are FLIR cameras any good? ›

Seek Thermal RevealPRO

While the FLIR C-Series produces useful images in good light via MSX, this camera can do so at any time, since it doesn't rely on visual light to boost its resolution. For our money, that makes it the best thermal-imaging camera for night use today.

What is the difference between FLIR and thermal? ›

FLIRs make pictures from heat, not visible light. Heat (also called infrared, or thermal, energy) and light are both parts of the electromagnetic spectrum, but a camera that can detect visible light won't see thermal energy, and vice versa.

How accurate is a FLIR camera? ›

The standard FLIR product accuracy specification of ±2°C or 2% of the temperature reading at 30°C (86°F) ambient environment applies to all temperature ranges it measures and for the multiple applications for which it can be used.

Which thermal imager is best? ›

One of the best handheld options is the Hti-Xintai thermal camera, with a high resolution of 320 by 240 pixels, a large screen for visibility, and an extensive heat detection range. For a budget-friendly smartphone attachment, consider the FLIR ONE PRO for Apple/iOS devices or the FLIR ONE Gen 3 for Android users.

What's better thermal or night vision? ›

Thermal scopes can easily detect animals or moving objects from a long distance whether it is day or night. Their detection is better than night vision scopes. Even in the roughest weather, they can help you see (except in extreme cold).

Can you use FLIR during the day? ›

Not only do thermal imaging cameras from FLIR provide unparalleled nighttime vision, but they also prove incredibly useful during the day.

Can FLIR see through walls? ›

No, thermal cameras cannot see through walls, at least not like in the movies. Walls are generally thick enough—and insulated enough—to block any infrared radiation from the other side.

Can FLIR see through fog? ›

Although thermal imaging cameras can see in total darkness, through light fog, light rain, and snow, the distance they can see is affected by these atmospheric conditions.

Will snakes show up on thermal imaging? ›

Against the background of other objects, humans, animals, or cars have higher temperatures, and they show up more clearly on the device's screen. However, cold-blooded animals like snakes, for example, would be virtually impossible to detect with a thermal imager.

How far can a FLIR camera see? ›

"Often, the first question that people interested in buying a thermal imaging camera ask is “How far can I see?” This is a very reasonable question to ask, but it defies any simple answer. All FLIR Systems thermal imaging cameras are able to see the sun which is more than 146 million kilometers away from Earth.

What is the difference between infrared and thermal imaging? ›

An IR thermometer, also known as a spot pyrometer or a temp gun, gives you a single number—the temperature measurement of a single spot on your target. A thermal imaging camera gives you temperature readings for each pixel of the entire thermal image, and allows you to visualize an entire scene in thermal.

How do you focus a FLIR camera? ›

How to Focus a Thermal Camera | Thermal Imaging - YouTube

What should I look for when buying a thermal imaging camera? ›

10 things you need to know about thermal imagers
  • Resolution. Detector resolution indicates the number of detector pixels on the camera. ...
  • Focus. ...
  • Temperature range. ...
  • Lens options. ...
  • Saving images and additional data. ...
  • Color palettes. ...
  • Color alarms. ...
  • Emissivity and reflected temperatures.

What does FLIR stand for? ›

Infrared Solutions from InfraTec. The term FLIR stands for the abbreviation Forward Looking InfraRed. The abbreviation FLIR originated in the course of the further development of the infrared camera at the beginning of the 1960s.

How do I choose a thermal imaging camera? ›

Apart from cost and quality, the two major factors that you should keep in mind when buying a thermal camera are Detector Resolution and Thermal Sensitivity. The Detector resolution is the number of pixels that the thermal imager can fill in a frame. More the pixels, more detailed the image is going to be!

Can you see deer antlers with thermal imaging? ›

Typically, deer have antlers so the thermal should be able to definitively tell you that none of your deer have horns. With a thermal, you can see the antlers when they are growing in and there is blood running in them. When they stop growing and harden you most likely can't see them, especially at any distance.

How far can you shoot with a thermal scope? ›

Scope Detection Range

A very high-quality thermal scope will allow you to positively identify the target at up to 4,000 yards, while an entry-level scope can limit you to 1,000 yards or less. A lot or a little depends on the working conditions and your tasks.

Can you use thermal in daylight? ›

Thermal imaging detects minute differences in heat when detecting game. Thermal scopes detect radiation and do not require any visible light to produce an image. Thermal imaging devices can be used equally well day and night.

Can thermal imaging see through trees? ›

Thermal imaging cannot see through trees (or wood), but it can be helpful for spotting people in forested areas where their heat signatures stand out much more than a visible image might.

Do fish show up on thermal? ›

Unfortunately, thermal imaging will not help you see fish when you are fishing because fish are cold-blooded creatures whose temperature is not constant and depends on the water temperature.

What is cheaper night vision or thermal? ›

While thermal is better for detection, it is definitely pricier than night vision. Thermal imaging is newer and more costly technology to manufacture. Night vision has been around since WWII and is much more available and affordable.

Can FLIR see through clothes? ›

The new X-T1 IR has a new function that means it can "see" infrared light which we can't see with the naked eye. As Wired say: "But one odd side effect of infrared photography is that, in some cases, it can see right through clothing. Not always, and the clothes have to be pretty thin in the first place."

Can thermal imaging detect mold? ›

Thermal imaging can not detect mold but can detect variations in temperatures behind walls, which assists in cold spots that can become potential moisture or water intrusion issues. Moisture meters are used after the hot and cold spots are found.

Does aluminum foil block infrared? ›

5. Can thermal imaging see through aluminium foil? ​The answer is NO. Any electrically conductive material will block infrared radiation.

Can you hide from thermal cameras? ›

A thick woolen blanket is a good variant to defeat the thermal imager. However, it is considered to be a quick temporary method of hiding infrared radiation. To block the heat, you just need to cover yourself with a blanket. Actually, the principle of hiding from a thermal imager is identical to a space blanket.

Can FLIR see through water? ›

FLIR cannot see through glass or water, but it can see where cold water gets pushed up by the whale's passage.

Can thermal cameras see through glass? ›

Can thermal imaging see through glass? Thermal imagers cannot pick up visible light. Therefore, Glass is not seen as transparent when viewed through a thermal imaging camera.

Is a thermal camera worth it? ›

They are a great tool because thermal imaging can see what your eyes can't. You'll see hot and cold spots where insulation is missing, identify where air is getting in or out of your house, and more.

What can you use a FLIR camera for? ›

A: Thermal imaging makes the otherwise invisible world of heat energy visible to your eyes. Everything around you either emits or reflects heat energy. For example, with FLIR ONE, when you look around a room in your home, you can see where doors and windows are not well insulated.

Will snakes show up on thermal imaging? ›

Against the background of other objects, humans, animals, or cars have higher temperatures, and they show up more clearly on the device's screen. However, cold-blooded animals like snakes, for example, would be virtually impossible to detect with a thermal imager.

Can thermal imagers see through walls? ›

No, thermal cameras cannot see through walls, at least not like in the movies. Walls are generally thick enough—and insulated enough—to block any infrared radiation from the other side. If you point a thermal camera at a wall, it will detect heat from the wall , not what's behind it.


1. This is the easy way to find a battery drain using thermal imaging - FLIR TG 267 Automotive camera
(M&R Auto services)
2. Thermal Imaging Camera - Flir TG267 Tool Review
(KRT Electrical Services)
3. FLIR Systems Thermal Imaging Tool Demo
(PTEN (Professional Tool & Equipment News))
4. The Perfect Thermal Camera for Automotive Professionals FLIR TG275
5. Reduce Diagnostic Time with the FLIR TG267 Thermal Camera
(Teledyne FLIR)
6. FLIR TG275: Designed for Automotive Maintenance & Repair Professionals
(Teledyne FLIR)

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