By type
Types
What a thermal is for decides almost everything else about it — whether it has a reticle, how wide it sees, what it weighs and where it mounts. A scope and a handheld with the same core are not competing for the same job, so the comparisons here stay within a type.
Riflescope
36 units · est. detection 396 m–2,083 m
Handheld monocular
19 units · est. detection 190 m–1,042 m
Clip-on
10 units · est. detection 515 m–1,250 m
Binocular
2 units · est. detection 729 m–1,042 m
Only groups with two or more units get a page — one unit is not a comparison.