Re: Pressure sensors
I agree a mechanical solution would be simple and should be reliable. As an alternative to the baloon concept what about a syringe. The air in the cylinder will exapnd at a predictable rate and the plunger will press a sensitive switch. It would be repeatable and testable without affecting the results, unlike a baloon who's rubber/latex may degrade and change each use.
Biting the hand that feeds IT
