Thanks guys!
The new test gear is alot of fun, it's amazing how much faster it is to test than the old bucket/stopwatch method. Then there was the actual manometers...all 16' of them...
Now I've got instant results, and so far even more consistent/accurate too. I've had a few bad graphs in the past outdoor manometer setup, and so far with this..I'm consitently getting a very nice set of data that fits a nice parabolic curve very well (very little deviation).
Anyhow, no I have not tested a swissflow, although I suspect it's a much higher precision tool. This little DigiFlow is pretty cheap and low on quality, so I'm not too suprised by the reading errors.
I'd be happy to test any extras anyone might have..
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