Thanks for thinking along guys! I was thinking that from the point of view of the potable water (as mentioned by Robert) and installation time, a professional industrial solution is maybe better. The screw-dread of the above mentioned flow meter is what I think hard to install on the available tubes. Better to invest in a better meter than in multiple connectors
So I was searching and found a better solution. This Vortex flow meter has a temperature and a flow output from 0.5 to 3.5 V. External power supply isn’t a problem.
