I understand that the current signal can be converted to voltage signal. I guess the question I was driving at was the availability and identity available analog inputs on the OS board that could be used for measuring flow.
This post suggests that this should be possible but I haven found any further discussion on this and it isn’t clear (to me) of the location of the A/I connections
http://rayshobby.net/opensprinkler/svc-faq/
I understand Ray is implementing a solution for flow measurement using the rain sensor. However if one has a flow meter (as I do) that provides a flow signal already conditioned to an analog signal then the rain senescence input wouldn’t have to be sacrificed for this purpose.