I guess for roughly the same price, I'm not sure why I wouldn't use a standard water meter? I like the fact that it has a manual dial for double checking. I also have a 1" irrigation pipe and my zones vary from 1.5gpm (dripper) to ~26gpm. None of the flow meters show that wide of a range skimming through the specs.
I do realize that a meter may have more pressure drop, but my street pressure is 110psi+ and I go into a pressure regulator down to 60psi for the irrigation system. Probably I'm lucky in that regard.
Reading the spec (thank you), a K factor could easily be created (1 if I understand correctly) with a 0 offset. So software wise, that should be easy if I ask nicely
That leaves the electrical concern. One option with the meter I was looking at was a 24vdc hall effect sensor. Other was a 24vdc/vac reed switch. I think all the other sensors have a hall effect sensor. But should be very low power like standard irrigation sensors.
Thanks for the reminder on the rectified 24vac... Should have remembered from my EE days... but now I'm a 1/0 person.
Anyway... I guess my reason for a regular meter is "why not"... I was considering this meter - FTB8010B-PR