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Hi Probe folks;

I'm back again, but amazingly this time it's not because I have a technical
problem.  This time it's just an easy question.

Our JEOL 733 uses some P10 gas-flow spectrometers.  We have the P10 tank
hooked up to it and use one of those little "flow meters", as JEOL calls
them, to see what the flow rate through the spectrometer is.  Manual says
"1-2 bubbles per second" when the little glass thingie (technical term) has
alcohol in it.

I'm ambitious to replace the valve we use now to control the flow (very
coarse, very crude) with an actual useful rotameter.   Problem is, I have no
clue what range I should buy.  If I creak back to my old chemistry days
usually they told you things like "1 drop is about 1 mL".  Rotameters are
expensive and I'd like to buy one with a correct range and not be

So for folks who actually know what the gas flow rate is, what are you

Best regards,
Steven Cogswell