I have to admit that I feel like I stepped back 15yrs looking at the cooper blue box. I use to have one of those when I started out and I certainly is/was the most reliable and accurate in my opinion. Today I use the fieldpiece digita dual temp. It is fast and seems accurate
I have a UEI amp clamp it is one of the best I have had. I had a dual scale thermometer for about 20 years. It died a while ago. I replaced it with the red cooper. Got a good deal on it. Oh I also have the UEI leak detector. I haven't had to use it a lot but I like it better than my tif 1-xz.
I have a uei dl379 as one of my back up meters, its a good reliable meter with lots of functions and reasonably priced. As for temp measurement I have lots of k type tcouple probes and clamps, a cooper atkins blue box, digicool manifold with dc thermistors and various other temp measuring tools, the cooper atkins is the most accurate and quick acting I have temp/humidity meter I have ever used. It has a permanent home in my truck next to my Bacharach h10
I am for doing good to the poor, but...I think the best way of doing good to the poor, is not making them easy in poverty, but leading or driving them out of it. I observed...that the more public provisions were made for the poor, the less they provided for themselves, and of course became poorer. And, on the contrary, the less was done for them, the more they did for themselves, and became richer.
― Benjamin Franklin