Yeah I have the High Flow from Aquacomputer. I found out that it can be connected directly to the MOBO even though that supplies 12V not 5V as AC requires 😉 Its a Digmesa Hall effect sensor inside, and I checked spec sheets of their stuff; they are usually well over 20V max input voltage. I hooked it up with a makeshift pump (my Aquastream is still burned out due to their stupidity on BUS/FLOW input/output port and using 5V not 12V industry standard as you saw in another thread), and its reporting between 5 and 19l/m. Make of that what you will 😄
Meanwhile Aquacomputer has been completely useless, not providing truthful specs, and not answering a simple support inquiry on the sensor . (can it be plugged in to 12V not 5V sensor drive signal) They basically want you to use ALL of their proprietary things. I won't be going with them in any future builds for this reason.