All of these things basically work the same, but you need to know how to use them to use them effectively. This one offers MUCH more flexibility for emissivity than the others. I don't know if that's too much or what, but shiny metals might be 0.05 and plastics 0.95. If you don't adjust it, you won't get the right temperature. Some others have very little customization so I have to assume this one is more accurate. I don't have a way to test its accuracy, but it gives me very reasonable numbers for things and works great for the things I've used it for. It's not something I use on a daily basis, in fact I'll probably use it several times a year. But it's great to ONLY know how hot an electronic part is, or a brake pad, or a number of things. A good tool to have on hand.
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