Well, yes, id really like to buy the RS6654694 thermal imaging camera but it costs £1495.
I used to work at a huge lighting multinational, and a huge TV multinational, and both places had one like this, but due to price, they only had the one, and it was always in use by somebody somewhere, and I reckon a lot of cheap ones that do a satisfactory job, are just as good as an expensive one that you can never get hold of.
At the lighting company, The expensive thermal camera was often set up on a tripod over an smps, and left there for ages, monitoring temperature and recording it into a data logger, absolutely wonderful, unless youre stood there waiting to use it.
Incidentally, I worked at a huge telecoms place, and they didn't have any thermal cameras or thermometers anywhere.....all temperature readings were done with glued on thermocouples.....presumably because of the problem of the user accidentally not properly setting the emissivity.
I reckon the RS7600385 FLUKE 62 is going to be fine at a 'relaxing' £89......its got 10:1 distance to spot, so if I hold the thing 50mm away from a DPAK FET then my measurement spot is 5mm radius, which is just right for the DPAK......I just hope I can see the laser pointers when i'm that close to the dpak, as the actual body of the thermometer may stop me from seeing if i'm properly aimed at the blessed dpak.......the datasheets and user manuals just don't help you with this kind of practical user knowledge
RS7600385 £89
https://uk.rs-online.com/web/p/ir-thermometers/7600385/
RS665 4694 £1485
**broken link removed**