Plasmafire's use a cold plasma method and they have two models
($1800 and $3200).
Longevity uses cold spark corona discharge and they also have
two models, the EXT-50 and the EXT-120 (I think about $1000 and
I personally own the EXT-120 and am very happy with it.
There are other medical grade units I know very little or nothing
about. For example, there is one manufactured by Synergy Systems
and sold on ebay down in the $300 to $600 range. The owner of
the company did post some information about them on this forum a
month or two ago and as far as I could tell from his detailed
description, they looked like good medical grade units.
Use the green welding tanks for oxygen. I use 20 cubic foot welding
tanks. Never have had anyone question me while getting it refilled
at a welding shop. Also, the pressurized oxygen comes from the exact
same place as medical oxygen.
If you're at all worried about little particles coming from the tank,
you can buy inline filters (I think plasmafire sells them).
Medical grade ozonators are not neccesary for ozonating water. They are primarily used if you want to do insufflation, ozone sauna, or direct injection of ozone. A decent water ozonator should output at leas 200mgs of ozone per hour.
"Medical Grade" - all it means is whether it uses oxygen or ambient air. [ but see rog's comments : "Medical Grade" also implies ozone-resistant materials and construction in the ozone path. ] People here report good results with ambient-air generators. They are cheaper, and don't require bottled oxygen. They are apparently reasonable for ozonating water. Personally, I had to use oxygen because we'll be using insufflation and possibly some other delivery methods. If you don't use pure oxygen, you will get impurities because the ozonator will act upon other elements in the air - the big danger being nitrogen. But for water ozonation, ambient air is ok. [ append 11/3/06 - Enaly units e.g. are quite cost-effective for this purpose; see http://curezone.com/forums/fm.asp?i=754382 ] If you need ozonation for anything other than casual use, you cannot have a "toy" generator, you *must* use oxygen feed. You'll get your oxygen from a distributor, so get out your Yellow Pages, but do not tell them what it is for. My distributor, AirGas, instantly asked me what I wanted oxygen for, and would have refused to sell to me (forever) had i told them the truth (i lied to them, saying it was for getting rid of mold in my barn). [ append 11/3/06 - other people have found lying to be unnecessary to get oxygen from their distributors, even their local AirGas distributor. However, I was actually refused, point-blank, when i said it was for personal use. Just use common sense. However, when I obtained a Longevity medical-grade oxygen tank, AirGas (who knew me well by then) refused to fill it, giving three consecutive excuses for why they couldn't do so. I had to drive 25 miles to another distributor. N.B. ] So be careful. Also, get an oxygen regulator (about $100).
If you are serious about a medical-grade ozonator (and you should be), consider the one from EBay from a regular seller there named MyGettinPlace. I got his high-end one (the only difference is in output : $680 or $399). The guy has a 100% positive feedback rating from EBay users, and I can tell you from personal contact with him that his high rating is 100% deserved. See http://myworld.ebay.com/mygettinplace
and just click on [Items for Sale] – you’ll find his two models.
Rog refers to this seller also.
If you want the best and can afford it, get the Plasmafire, it has a lifetime warranty. But you’ll be fine with the Synergy Systems one on EBay. We got the high-end Synergy Systems one, and it is excellent. Don’t worry about the lack of lifetime guarantee, this distributor has never had one fail, and would fix it for you if it did. If you’re rich, go ahead with the Plasmafire model. We are not rich, so we could not buy it ($3200 or $2000). The distributor, Dr. Saul Pressman, is brilliant, and is worth getting to know. See this link for his excellent intro to his ozone generator : http://healingtools.tripod.com/saulsltr.html.
These two brands represent the low and high investment on the best type of ozonator. You can pay $400 or $3200, and the only difference is in output. Here's where you need to understand that "medical grade" does not refer to the method of ozone generation (the "technology") - there is more than one method. For AHT or IV ozonation, you must get a cold-plasma generator - but if you're going to do one of those, you'll want professional guidance in any case. The Plasmafire is a cold-plasma generator. You will note that cold-plasma is hard to find - and you will find liars, so i am told. [ and so I found out. There's a lot of hype (lies) about the term "cold plasma". ]
Do research to validate everything you hear, either here on this forum or otherwise. The reason is, you yourself must understand the how and the why of ozonation. The more serious you are about ozone, the more you must find out.
And ask questions here, to get started. This place is incredibly good.
Thanks for the post. I just wanted to point out, though, that the Synergy uses cold corona discharge, similar to the Longevity units. Plasmafire is the only company that I know of that produces cold plasma units.
Also, the construction material used on the ozone path through the machine is also important in certifying that a machine is truly medical grade quality. These 3 brands shouldn't have a problem in this area, but there could be a machine that uses oxygen tanks, but the ozone path does not contain completely ozone resistent material in which case it coultn't be considered medical grade. If the material were not ozone resistent, then it could break down and add something more than merely ozone gas to the equation.
And there it is, even my supplier was fooled,
as was I. I wrote him to confirm what technology
the Synergy unit uses - and he told me (quote)::
"Scott, it is cold corona/plasma."
Uh, yeah, is that "cold plasma" or "corona"?
He is an honest man, no question in my mind
there, but he is not technically savvy.
So I must apologize for the misinformation:
the Synergy Systems unit is... well, what it is.
Nothing replaces research!