I have an idea for the detection of a very small amount of air current. When I say small, I mean the flow of air is so small and slow that I don't think any thermo type device is going to detect it.
The reason I am asking is we've been using helium and alcohol around a vacuum system to detect leaks and it's very hard to work with those in the scan chamber and be elsewhere with the RGA sniffer.
So I have been thinking. Is it possible to ionize a very small area of oxygen (air) and then be able to detect this ionized sample as it passes through a detector element ?
I was thinking if I was to make a probe that can ionize a very small area of air and the detector, which would be in the probe also, going along the side of a gasket area, a vacuum leak would draw some of this oxygen and have it pass over the detector.
Like I said, the vacuum system would only be leaking ever so slight and I thought maybe if I could detect ionized air being pulled across the plane of the sensor it may be a feasible tool.
Any one have some thoughts on this?