I have the same brand flow meter, 25mm version. I believe its 0.016067L/pulse from data I have (1 pulse/sec = 0.964LPM). The closest open sprinkler can be configured to is ether 0.01 or 0.02 L/pulse. Planning to fit an Arduino nano “in line” that will convert the (3 wire) pulses to a dry contact at say a 15:1 ratio so I can get the flow monitoring l/pulse setting closer. Just waiting on the relay module, the rest has been bench tested..