I hope you will get accurate flow meters here also https://www.nriparts.com/instrumentation/flow-meters/ .
@user53670 started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I hope you will get accurate flow meters here also https://www.nriparts.com/instrumentation/flow-meters/ .