This document compares the field of view (FOV) specifications and sample thermal images from four thermal imaging cameras: the Testo 875-2i, Fluke Ti125, Flir E40bx, and Milwaukee M12. It shows images taken from the same distance and comparing the different sections captured. It also shows images taken from varying distances needed to capture the same image section given the different FOV specifications of each camera. The Testo 875-2i, Fluke Ti125, Flir E40bx, and Milwaukee M12 cameras are compared using thermal images of objects like a switch cabinet, engine, and air heating unit taken from set distances and distances adjusted for their FOVs.

1. testo 875-2i vs.
- Fluke Ti125
- Flir E40bx
- Milwaukee M12
FOV-comparison

2. 2/13Testo AG, Image comparison testo 875i, 1000len-mkh, 01.07.2013, Confidentiality 1
Image comparison
Product testo 875-2i Fluke TI125 Flir E40bx Milwaukee M12
Detector 160 x 120 160 x 120 160 x 120 160 x 120
FOV 32° x 23° 22,5 ° x 31° 25° x 19° 25° x 19°
This image comparison shows how the diffrent FOVs influence the image frame of the
individuall camera:
In the first comparison all thermal imagers measure an object from the same distance. So you
can see the different image sections you get with several FOV’s of the thermal imagers.
In the second comparison we tried to get the same image section for every thermal imager
with the different FOV’s. So the objects had to be measured from different distances,
depending on the camera. You will see these different distances in the presentation.

3. FOV-comparison
1. Comparison
Same distance/ different image section

4. 4/13Testo AG, Image comparison testo 875i, 1000len-mkh, 01.07.2013, Confidentiality 1
Switch cabinet - 90 cm / 35.4“ distance
testo 875-2i Fluke Ti125
Flir E40bx Milwaukee M12

5. 5/13Testo AG, Image comparison testo 875i, 1000len-mkh, 01.07.2013, Confidentiality 1
Switch cabinet - 60 cm / 23.6“ distance
testo 875-2i Fluke Ti125
Flir E40bx Milwaukee M12

6. 6/13Testo AG, Image comparison testo 875i, 1000len-mkh, 01.07.2013, Confidentiality 1
engine - 80 cm / 31.5“ distance
testo 875-2i Fluke Ti125
Flir E40bx Milwaukee M12

7. 7/13Testo AG, Image comparison testo 875i, 1000len-mkh, 01.07.2013, Confidentiality 1
Air heating - 3 m / 118.1“ distance
testo 875-2i Fluke Ti125
Flir E40bx Milwaukee M12

8. 8/13Testo AG, Image comparison testo 875i, 1000len-mkh, 01.07.2013, Confidentiality 1
Heizschleife - 3 m/ 118.1“ distance
testo 875-2i
Milwaukee M12

9. FOV-comparison
2. Comparison
Same image section/ different distance
10.06.2013 Autor

10. 10/13Testo AG, Image comparison testo 875i, 1000len-mkh, 01.07.2013, Confidentiality 1
Switch cabinet
testo 875-2i - distance 90 cm / 35.4“
Fluke Ti125 - distance 115 cm / 45.3“
Flir E40bx - distance 115 cm / 45.3“ Milwaukee M12 - distance 110 cm/ 43.3“

11. 11/13Testo AG, Image comparison testo 875i, 1000len-mkh, 01.07.2013, Confidentiality 1
Switch cabinet
testo 875-2i - distance 60 cm / 23.6“
Milwaukee M12 - distance 75 cm / 29.6“
Fluke Ti125 - distance 65 cm / 25.6“
Flir E40bx - distance 75 cm / 29.5“

12. 12/13Testo AG, Image comparison testo 875i, 1000len-mkh, 01.07.2013, Confidentiality 1
Engine
testo 875-2i - distance 80 cm / 31.5“
Flir E40bx - distance 110 cm / 43.3“ Milwaukee M12 - distance 105 cm / 41.3“
Fluke Ti125 - distance 90 cm / 23.6“

13. 13/13Testo AG, Image comparison testo 875i, 1000len-mkh, 01.07.2013, Confidentiality 1
Air heating
testo 875-2i - distance 3 m / 118.1“
Flir E40bx - distance 4 m / 157.5“ Milwaukee M12 - distance 3,8 m / 149.6“
Fluke Ti125 - distance 4 m / 157.5“