no sorry, cant help you on the xflow.
I went all in with Aquacomputer stuff and got the Aquacomputer Flow Sensor High Flow meter.
Can have a temp probe attached, worked with any size tube and connects to mobo via usb and reads in software.
Plus an inline tube temp probe next to it and its on the first part of my loop out of the pump.
I then have temp probes post gfx card, post cpu and one in the reservoir.
Allows me to see how the heat builds up and cools down round the loop.