Currently i think you don't need to be able to measure down to 0Hz
Down to 50Hz is probably fine. I always use the 50Hz (and up) modes
on my meter. I rarely use the modes that measure lower.
Having said that, i'm measuring stuff in the 16Hz mode, the manual says this mode
is for rail way wires from trains (Europe only).
I'm living not far from train rails. But i don't know the impact of that.
I like to know if someone does ? But likely nobody here will know :)
This is mixed in between the other fields above 50Hz, of which there is a lot more.
Being able to measure really low is something i can't miss because i study things,
but most people don't need that i think. So being able to measured down to 1nT
is fine (unless you plan on doing what i do).
It's better to have a variety of tools, like also having tools to specifically measure dirty electricity.
yeah, Jeromy's advice is pretty good.
i have posted a list on my Facebook page a while back.
But i won't update it.
Too much work.
https://www.facebook.com/profile.php?id=100015999063685 Scroll down on my timeline to find it.
It's made up of 4 parts (1-4).
If you can't see it i can post it here.