✔ WATER FLOW SENSOR: 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. ✔ HALL EFFECT: 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. ✔ COPPER MATERIAL: Made of high-quality copper material, environmental-friendly, really sturdy and durable to use. ✔ IDEAL DESIGN TO USE: Lightweight, reasonable size, stable performance, low water pressure start, easy to install, safe to use. ✔ WIDELY APPLICABLE: It 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., Weight: 0.21605301676 Pounds, Manufacturer: Aigend