Nice! Yes, you can read frequency channels with YourDyno, and convert this to a flow channel. Let me know if you want to discuss any details.

I was thinking a dedicated box, your existing box with two pressure sensors built in and another to measure velocity. Yes an air flow meter for low flow ranges. you can also measure swirl and tumble. Your practically there. Dedicated software shouldnt be too hard. Just like another manufacturers box and software package, but better. Its easy for me to say all this but I realy think It would be a perfect project to build from what you have working.

Also take a look at PTS Flowbench, has a really nice setup for flowbenches.  I use Bruce's setup on my flowbench and it works awesome just like the YourDyno system on the dyno!!

http://www.flowbenchtech.com/

A friend of me also has built a flow bench and the key is to have high quality pressure sensors that remain stable and are accurate. We went in the end for the TE HCLA series sensors with i2c output. Instead of using a zillion china vacuum motors like superflow does we use a side channel compressor from scap (about 100 euro if you look out a bit) around 5 kW with a VFD. the rpm is closed loop controlled to maintain 28' water or whatever test pressure is desired. with a set of valves as used on swimming pools we can do both in or outlet mode. the bench uses 3 orifice sizes which can be openened or closed with flaps much like a wastegate flap but then with a rubber sheet so its fully airtight. So it can measure a small head like from a 50cc honda up to a big block head with 2' valves with good accuracy and repeatability.

@rub87 Here is a bench I built which I am considering building a your dyno logger to replace what I have. http://swarfman64.blogspot.com/2023/03/diy-flow-bench.html

Looking sweet! Our blower is a bit bigger. Makes it a bit easier on the ears if you can spin it slower