Quote: (Originally Posted by 2stoned)
What if the "sniffer electronics" where to read from samplings.
Working something like this:
Direct the gas through a smaller tube to blow by the "sniffers".
This way, through simple valves or switch-block, (if made simple and thus "safe") you could sample from different areas, Ex.:
- Plenum (after absorbent, as now)
- Exhale Counter-Lung (diver CO2 production)
- Inhale hose (after Diluent entry)
a) Thin tube to point just prior to mouthpiece?
b) Through a hydrophobic membrane, from within the mouthpiece?
- Outside surface air (needs a self-closing seal, pull and hold to keep open)
- Outside with a small chamber (balloon?) for gas testing.
The system could default to Plenum or Inhale hose.
This gives the option for the system to check various areas for safe status.
One would need gas flow up the hose. That is quite complex because it must from from somewhere to somewhere, and be forced.
There are only two places one wants to sample: the gas the diver is breathing comes from either the scrubber or the bail out. Therefore post scrubber is fine. The bail out issue is more complex.
Quote: (Originally Posted by 2stoned)
If from all valves inducing gasses into this blend, the gas was send by a twirling tube or towards a whirled cone, a venturi effect would be created that might assist in these gasses blending.
Why would the gas flow along the narrow tube? The main flow is a huge tube (over 1000sqmm cross sectional area).
Quote: (Originally Posted by 2stoned)
OK now! Go to work and make this thing happen!
Can you supply the detail, or the magic wand?
Cheers
Alex