... /min, working voltage: DC3-18 V, rated voltage DC5V; 5, output voltage (rated DC5V) : high level 4.5 V above, low ... level 0.5 V the following; Pulse output occupies emptiescompared to 50-10%; 6, designed for small flow ... : the positive, black: negative, yellow: pulse signal Water flow sensor (water flow sensor) and flow switch (flow switch) outlet terminals installation dimensions ...