including a DC-100Khz clamp probe for a Fluke 190 portable oscilloscope. I have dragged the Extech to the boat when I needed it, but I am building up my collection of tools there because it is a 3000 mile commute. In a small self-contained DC clamp meter, the Extech was the only one I had ever seen, until this Blue Sea was pointed out. It looks like the latter has a few less features at a lower price. It probably does 95% of what needs doing, so that makes it the Value Leader (my opinion). The Extech is a few bucks more with a couple of extras. The Extech does NOT have true RMS voltage, so if that is a concern you might not want it. Not a concern for me since my inverter is a sine wave model.

I also have a Fluke 117 on board, I find it easier to use as a multimeter than the Extech. And of course it does do true RMS voltage ;). The main reason a larger meter is more convenient to use as a multimeter is that it weighs enough to stay put when you tug a little on the leads, and the digits are large enough to read when you get over age 45. On the other hand you want the clamp meter to be small and light so you can clamp it in all sorts of awkward places. One thing you might want to consider no matter what you buy is a couple of different kinds of lead sets: there are some with clip-on leads that are pretty handy unless you have three arms, one of which is 5 feet long and double jointed.

A quick pointer: on the clamp on meter, you must make sure the jaws are closed and not being held slightly open by either the weight of the meter or some dirt or whatever, the slightest gap in the clamp will give large errors in reading. As physicist would say, "you will be fluxed!"