stand-alone flow sensor setup...

[madmr2]

Hello, I've asked this via email but never got an answer so I'm trying in here. I want a flow sensor to go with my water injection kit (not aquamist).

I've read on forums that the only reliable sensor was the aquamist... Am I correct in thinking I could get these 2 items and be ok?
http://www.aquamist-direct.com/806-5...nsor-assembly/
http://www.aquamist-direct.com/806-5...-sensor-cable/

If so, does anyone have the linear equation for sensor voltage vs flow?

thank you!