Description:Our water flow sensor is made of high-quality copper material, very sturdy and durable to use, it is a kind of G1/2" type water flow sensor, its maximum water pressure is 1.75MPa and the range of flow is from 1L/min to 30L/min. 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. 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. 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: 100% Brand NewMaterial: Copper Color: Shown as pictureType: G1/2"(External Thread Diameter), DN20mmWater Quality Requirement: 60Start Flow Range: 1.5L/minFlow Range: 1-30L/minMaximum Water Pressure: 1.75MPaWorking Voltage Range: DC4.5-18VMax Current: 10mAInsulation resistance:100MElectrical Strength: AC500V, 50HzCopper Switch Length: Approx. 60mm / 2.4inchWire Length: Approx. 35cm / 13.8inchWeight: Approx. 95gPackage Included:1 x Water Flow Switch