KARPEN PILE

[profitis]

No pomodoro.a nickel electrode and a silver electrode in KOH under air will discharge all way down to,wait for it,0.1 volt,20micro-amps/cm2(bursts!) and stay there lol.so you know that if it stays up at 0.6-1 volt after repeated dischrge cycles it is definitely hydrogen giving that potential.nickel and silver under air infact makes a weak O2 karpen cell lol.once that Ni(OH)2 layer forms it goes totaly inert.

[profitis]

A mg of O2 contamination is one hell of a volume of air(a few mls?).if we can cut out contamination to a few micrograms/minute then air will reduce at a faster rate than it can be supplied and cut its voltage contribution to negligible.its a very difficult task getting H2 contained without a leak which is why I was all for the flow-through method of gadget1.if we can repeat gadget1 but carefully making sure no leaks then it would be a good reading.the outlet pipe should be dunked in a beaker water so outlet H2 can bubble out without possibility of significant air backwashing in.

[MarkE]

I would think that a small positive pressure should be enough to prevent intrusion and / or make up for H2 leakage.  I don't think you need to have a measurable continuous flow to overcome glass / metal seal leaks.

[profitis]

Your palladium electrode and silver electrode once totaly discharged under pure air should come down to roughly 0.1v and a few tens of microamps/cm2 in other words another O2 karpen.

[profitis]

True @mark E.but you'd need to see that the pressure is maintained in order to know that pressure is maintained.a valve on the gadget1 gas exhaust pipe is one way to do this.