Nitrox Stick auto adjusting blender

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What O2 sensor are you using? What He sensor be appropriate?
No HE sensor. You use another o2 sensor. You calculate the displacement of o2 with helium. So if first mixing chamber sensor reads 10.5, you have 50% helium. Then you add o2 back in the 2nd mixing chamber. At least that is what I have been told. It has been a long time since I took the blending course and since I don’t have a reason to dive trimix up here I have since forgotten most of the more advanced calculations.

I’m using the old R-22D sensors out of my O2ptima CM. instead of throwing them away, I just trickle them down. 1 year in rebreather, 1 year in the mixing stick and my divesoft analyzer. Then garbage.
 
https://www.shearwater.com/products/swift/

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