Premium MaterialMade of high quality copper material, eco-friendly, really sturdy and durable to use. Three Wire Connection Water Flow Sensor G1/2 type, its maximum water pressure is 1.75MPa, the flow rate range is 1L/min to 30L/min. Three-wire connection: red for positive pole, black for negative pole, yellow for pulse signal. With Hall Effect SensorThere is a built-in hall effect sensor that outputs an electrical pulse every turn . The hall sensor is sealed from the water pipe and keeps the sensor dry and safe. Easy InstallationLightweight, reasonable size, stable performance, low water pressure start , easy to install, safe to use. Widely ApplicationCan be perfectly used for water heaters, water dispenser, water purifier, water dispenser, coffee maker, appliances.< /p> Number of sends:1 pcs