Diy Trimix analyzer Arduino, anyone who has test?

It's an interesting concept, using a co2 sensor for helium and running it through some math to get helium content. The o2 side of things has been done many times, and there are some good examples floating out there to prove it.

Hopefully someone more knowledgeable about the specific challenges you may or may not face using that sensor to read helium content. If you decide to go for it, please keep us updated, as a sub$100 DIY trimix analyzer would be amazing!

Jim
 
Hi
I done one 2 years ago in case of my current commercial one die (it was à 9 nine years old unit)
My diy unit has for helium percentage around 2% différence with the commercial unit (remember for helium 5% is tolerate)
For o2, it is well known I think.
Today I still continue to use the 2 unit for checking perpose around once a month.

If still interested I can post more detail.

Kr
Fred
 
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