Does anyone have a sense of how much an inexpensive in-line flow meter (like this http://jaycar.com.au/products_uploaded/ZD1200.pdf
) would actually impede flow? I have an application where I need to get the highest flow possible and ideally would use some kind of sensor outside the hose but I believe those are very expensive. If something like the above is only going to reduce flow by 1% I could live with it but not 10%.
I realize I could just buy one and do a quick experiment but thought maybe someone had already been through this.