Water Flow Sensor 1Pc Water Flow Switch for Water Heaters Water Flow Measurement Device

G1/2 type water flow sensor , its maximum water pressure is 1 . 75MPa , the range of flow is from 1L/min to 30L/min . Three wire connection : Red for positive pole , black for negative pole , yellow for pulse signal There is an integrated hall effect sensor that outputs an electrical pulse with every revolution . The hall effect sensor is sealed from the water pipe and allows the sensor to stay safe and dry Made of copper material , environmental friendly , really sturdy and to use Lightweight , reasonable size , stable performance , low water pressure start , easy to install , safe to use Can be perfectly used for water heaters , water dispenser , water purifier , water vending machine , coffee maker , flow measurement device , water control machine and so on