how to accurately mix gasses?

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I Can't have every gas combination possible on my truck that I use, I want argon for TIG work, C25 for dual shield flux core and short circuit MIG where a WPS calls for it (which surprisingly is not readily available where I am) 100% Co2 for where dual shield with it is acceptable, some C10 when I need to do some spray transfer solid wire is great, plus oxy and acetylene.I'm guessing you are seeing where I'm going with this, I want to only carry 4 E sized (140ish cubic foot) bottles around, oxygen and acetylene, an argon bottle and a Co2 bottle.What is the best way to accurately meter argon and Co2 for a mix, I am mostly going to be wanting C25 and C10 mixes, but I will has to be able to demonstrate accurate (within 10%) flow rates for the gasses to be approved by the CWI, what mixing tools are out there that can do this?The best idea I have atm is an CO2 calibrated ball flow meter and an argon calibrated ball flow meter on they're respective bottles connected with a Y connecter after the meters.
Reply:https://www.millerwelds.com/equipmen...ent/gas-mixers
Reply:Sure, gas mixers are the best, and most expensive, solution to your problem.  I have done it in the past with a "Y" connector and separate flow meters to produce a 90/10 Ar/CO2 mix from a cylinder of 100% Ar and another with C25. I understand you are doing something a little different, but the same principles should apply.  Rather than explain the calculations I used in detail, here is a link to a post by Oscar on another forum that spells it out.....https://forum.weldingtipsandtricks.c...hp?f=6&t=14410ScottMiller XMT 350 CC/CV w/gas solenoid opt.Miller S-22A wirefeederBernard 400A "Q" gunMiller Spoolmatic 30A / WC-24C-K 200A torch/gas lensWeldcraft WC-18 watercooled torchHypertherm Powermax 30Victor O/A
Reply:ttoks, you CAN have every gas mix available if you want!   With a few specialized flowmeters I can build you a Frankenmixer flowmeter station where you can hook up 3 gases: Argon, CO₂, and O₂.  The O₂ is optional, but who knows, you might need to add in small amounts of it.  You can then proceed to dial in any reasonable gas mixture from just 3 tanks.  The O₂ tank I use is the small 20 ft³ since it is only used in tiny percentages, it takes up hardly any extra space, and lasts a very long time.This is one I built for a customer/friend, it has dual CO₂ flowmeters since he, like you, wanted to dial in C25 with a large overall flowrate, along with low percentages for spray/pulsed-spray



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