What’s the best thermal camera? There is no one answer to this question. That’s because the best thermal camera is the one most compatible with your application, preferences, and budget. To help you choose the right thermal imager for your needs, FLIR has highlighted four important factors.[1]
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FLIR’s Four Thermal Camera Factors
It can be overwhelming to compare thermal imaging cameras given the volume of information available. To help, FLIR advises distilling your comparison to these four crucial criteria: resolution, focus, field-of-view, and battery life.
Notably, application and budget are not included in this list as these are subject to your circumstances. Nevertheless, you should always bear these two points in mind when comparing thermal imaging cameras.
1.) Thermal Resolution
Typically, thermal resolution correlates to the cost of the thermal imaging camera. That is: the lower the cost of the thermal camera, the lower the thermal resolution. Still, lower-resolution infrared (IR) cameras remain effective at close range and are perfectly well suited to examining easily accessible targets. However, if you anticipate inspecting targets metres away and/or very small targets, you’ll likely require an IR imager with a higher resolution.
2.) Thermal Camera Focus
Fixed-focus thermal imagers demand the user move the camera to capture a crisp image. These, typically lower-end, infrared-imaging cameras are perfect for those who need to see thermal contrast but don’t have to capture accurate temperature measurements. That's because out-of-focus thermal images compromise temperature measurement accuracy. As such, individuals who require precise temperature readings are advised to purchase an infrared camera with an adjustable focus.
3.) Field of View (FOV)
Your application will have a big influence when it comes to choosing a camera with a suitable field of view. For instance, if your work involves a lot of close-up inspections, a wide-angle lens with a field-of-view of 45° or greater will be of more use than a telephoto lens (12° or 6°) optimised for long-distance observation. Some thermal cameras are designed to enable use with interchangeable lenses of varying fields of view, thereby facilitating both close-up and long-range inspection. However, these cameras tend to have a higher price point.
4.) Battery Life
Once again, your application will dictate the kind of battery and length of operating time you require. FLIR advises that you pay particular attention to:
- Expected battery life based on continuous usage
- Battery standby time
- Interchangeability of batteries
If you anticipate using your thermal camera in short bursts every few weeks, then an infrared imager with a long battery standby period is best. Alternatively, if your work demands continual, daily use of your thermal imaging camera, then an IR imager with a long battery life that supports quick, easy swapping of batteries is ideal.
Comparing FLIR Thermal Cameras
Below are three FLIR thermal cameras: an entry model; a mid-range model; and a premium model. The table illustrates the differences between their thermal resolution, focus, field-of-view, and battery life.
Entry Model
Thermal Resolution: 160 x 120px
Thermal Focus: Fixed
FOV: 54° x 42°
Battery: Rechargeable built-in battery with 4-hour life
Mid-range Model
Thermal resolution: 320 x 240px
Thermal Focus: Fixed
FOV: 45° x 34°
Battery: Interchangeable, rechargeable battery with a 4-hour life
Premium Model
Thermal Resolution: 640 x 480px
Thermal Focus: Dynamic focusing options
FOV: Compatible with interchangeable lenses
Battery: Interchangeable, rechargeable battery with a 2.5-hour life
View FLIR’s thermal camera matrix for a comprehensive comparison of all FLIR’s handheld thermal imagers.
Compare FLIR's Handheld Thermal Cameras
Further Information
For additional advice on choosing an appropriate thermal imaging camera, please contact our Sales team on 01642 931 329 or via our online form.
Alternatively, you can read FLIR’s guidance on choosing the best thermal camera below, as well as access a comprehensive comparison of all FLIR handheld infrared imagers.
What is the Right Handheld Thermal Camera for You?
FLIR Handheld Thermal Camera Matrix
In the meantime, please browse our extensive range of FLIR thermal cameras below.
[1] All information was gathered from the following source:
- FLIR, What is the Right Handheld Thermal Camera for You?, last accessed 29 January 2024.
