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 New Material: Copper Color: Shown as picture Type: G1/2"(External Thread Diameter), DN20mm Water Quality Requirement: ≤60℃ Start Flow Range: 1.5L/min Flow Range: 1-30L/min Maximum Water Pressure: 1.75MPa Working Voltage Range: DC4.5-18V Max Current: 10mA Insulation resistance:＞100MΩ Electrical Strength: AC500V, 50Hz Copper Switch Length: Approx. 60mm / 2.4inch Wire Length: Approx. 35cm / 13.8inch Weight: Approx. 95g Package Included: 1 x Water Flow Switch Features Accurate Measurement::The G1/2 water flow sensor has precise measurement capabilities and can sense subtle changes in water flow. Within the flow range from 1L/min to 30L/min, accurate monitoring can be achieved whether it is a small flow or a large flow. Durable Material:: This water flow sensor is made of high-quality materials and can withstand a maximum water pressure of 1.75MPa. Its sturdy construction and secure connections ensure stability and durability over long periods of use. Three-wire connection:: The G1/2 water flow sensor adopts a three-wire connection method, with red as the positive pole, black as the negative pole, and yellow as the pulse signal. This connection method allows the sensor to be easily matched with your device or system to achieve stable data transmission. Widely Applicable:: This water flow sensor is suitable for various water flow monitoring applications, such as household water use, industrial production lines, agricultural irrigation, etc. Its wide range of applications makes it ideal for many projects. Easy to Install:: The installation process of G1/2 type water flow sensor is simple and easy. Simply place the sensor in place and connect it to your device or system using a three-wire connection to get started. No complex debugging or professional operations required.