Features: Convenient to use. G1/4'' DN8 quick-connect. Can be use for water purifier. High quality material, durable in use. Basic Principle: When the water flows in the preset-flow channel, it pushes the magnets to move. When the corresponding reed tube senses the magnetic field, the reed tube connected. When there no water flow, the magnets will return under the thrust of the spring, and the corresponding reed pipe will disconnect after it cannot sense the magnetic field. Specifications: Material: Plastics Startup-Flow S2-Type: 300ml/min Response Time<1S Wire Length: 50cm Electrical Parameters: Applied between voltage resistant live part and non live part DC160V, 1min or DC200V, 1s (No flicker or breakdown) Maximum Closing Current 0.5A Maximum Load Current 1A Connected Capacitance 0.2PF Applicable Environment: Applicable Water Quality: Turbidity<1; Applicable Water Pressure: ≤ 0.8MPa Applicable Water Temperature: 5~50 ° C Ambient Humidity:<85% Storage Temperature: - 20~50 Size: Approx. 1.5x6.2cm/0.59x2.44in Package Includes: 1x Flow Switch note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.