Now come on. When have you ever known the cheap ones to be as good as the more expensive ones in anything?
Yeah, get it. I use a tri-meter just like that... never had an unsuccessful grow because of it.
It is not essential in any way else i would not be getting harvest after harvest of different plants at the moment
If you are growing new strains then you will have to wait for burnspots for you to know what EC is too high, it is more accurate than knowing that 40ml is too much, but the point is this increased accuracy is totally unnecessary. 
Without a ppm reading, how will the grower know how much they have cut back if burning occurs? Just slosh in some plain water and hope it was enough and not too much?It is not essential in any way else i would not be getting harvest after harvest of different plants at the moment
Your idea of new users overfeeding because they do not know what the ppm is hogwash. If they are overfeeding, it's because they are overfeeding, knowing the ppm will not stop them overfeeding, as they will not know what ppm constitute overfeeding with this plant. They can either do it the traditional way and simply drop the amount of ml per litre, or they can get fancy and use an electronic meter to tell them that they are feeding it fewer ml per litre. You seem to be failing to understand that a ppm reading is little different to a ml/litre reading, whether i follow the direction on the bottle which i have happily done since my first grow without issue, if i knew that the advice was 50% strogner than my plant would want it, then i'd simply adjust the amount of nutrients i feed it, i have no use for a meter to confirm what i already know.
So again, sure, they can be useful if you want to make use of it, but are in no way needed soil or hydro experienced growers or beginners. Half the growers i talk to don't even bother Ph'ing their water, let alone ECing it. So much bullshit has been put into the concept of growing, growing cannabis has been around a lot longer than digital meters have and it did just fine and still does
I guess some people are just capable of growing good weed without having to have special meters and hudreds of additives and sterile environemtns and perfect climate control and the rest of the scam associated with growing 
Yeah, you go on and "sit happily" with your "awesome grow." Great pictures of your "awesome grow" btw. I guess we'll just have to take your word for it.Yup, i make no sense. Lol. You enjoy complicating your grow and trying to justify your expenses, i'll sit here happily with my simple yet bountiful grow
If we're talking making sense, it's spelt "guy" not "go"
If this guy was interested in growing organically in soil, he wouldn't be asking about an EC meter in the hydro section, would he?
In that case you better spend good money on a good tri meter that sits in the solution so you have constant monitoring. When I grew Hydro (UCDWC) mine would send me an email if the PH, PPM (EC) or Temp would drop below or raise above a certain level. Spare no exspense when it comes to guages and equipment for the dro grow... 
