why do I need an ohms meter

[Alien Traveler]

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I am not in subohming so I am perfectly satisfied with ohm reading my Vamo gives me.
I do not think most (cheap vaping-oriented) ohmmeters are much better than built-in meters (all use chinese-built circuits), but for subohming it is much safer to read first with dedicated meter and then double-check it with built-in one.

Well most ohm meters have a tolerance of +/- .2 ohms I'm talking about the 20 dollar meters like the smok or the others you see on various websites. The built in meters on cheap devices are much worse than that and can be notoriously inaccurate all the way up and down to +/- .5 - .6, if you're not sub ohming chances are you'll be fine but that's still pretty far off. They're not always off by that much but I'd still keep a dedicated reader around for peace of mind.

My Vamo reads +-.1 (checked with various coils from different manufacturers), much better that stated by you +-0.5. WW devices would not operate properly if they read ohms poorly. And, as I already said, I recommend build-in meters only for higher resistances. And I do not believe ohm meters made for vaping are of really good quality anyway. So, for subohming two meters are better than one.

I am still curious how big difference in tolerances are for different ohm meters for vaping, but it is tough to find. I just tried web site of myvaporstore.com:
Smoktech Omnitester - Rechargeable E-Cig Voltage & Ohm Meter
They stated SmokTech ohm meter is “accurate to 0.4%”! Ridiculous and dangerously misleading statement.

 

[Eric Snyder]

It is a MUST!

 

[Brian Bavington]

ok let me give this a shot I got one mod It reads pretty much dead on all the time got another mod that just bought I've been using it for about a month now it started acting goofy and I could not figure out what the problem was now is it my mod or is it the atomizer I use come only to find out in this case it was a loose 510 connector so why have a separate ohm tester I imagine to take the guess work out it's always better to double check something and not check it sorta like when I put the batteries in my unlimited mod It takes two 18 650 takes me a seconds to double check before I put them in the right way and I double check beats the hell out of the alternative

 

[tj99959]

why do I need an ohms meter

So that you now what you're doing instead of just guessing.