Our water flow sensor is made of high-quality copper material, very sturdy and durable to use, it is a kind of G34" type water flow sensor, its maximum water pressure is 1.75MPa and the range of flow is from 2Lmin to 45Lmin. Lightweight and has compact size, stable performance, low water pressure start, very easy to install and safe to use. And 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. Features:Made of high-quality copper material, environmental-friendly, really sturdy and durable to use.G34" type water flow sensor, its maximum water pressure is 1.75MPa, the range of flow is from 2Lmin to 45Lmin. 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.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. Specifications:Condition: NewMaterial: Copper Color: Shown as pictureType: G34"(External Thread Diameter)Water Quality Requirement: 60Start Flow Range: 1.5LminFlow Range: 2-45LminMaximum Water Pressure: 1.75MPaWorking Voltage Range: DC4.5-18VMax Current: 10mAInsulation resistance:100MElectrical Strength: AC500V, 50HzCopper Switch Length: Approx. 45mm 1.8inchWire Length: Approx. 35cm 13.8inchWeight: Approx. 110gPackage Included:1 x Water Flow Switch