Premium MaterialMade of high-quality copper material, eco-friendly, really sturdy and durable to use. Three Wire Connection G1 or 2 type water flow sensor, its maximum water pressure is 1.75MPa, the flow range is 1L or min to 30L or min. Three-wire connection: red for positive pole, black for negative pole, yellow for impulse signal. With Hall SensorThere is a built-in Hall effect sensor that emits an electrical pulse with each turn. The Hall effect sensor is sealed from the water pipe and allows the sensor to remain 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, dispositi.< ...> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.