Description: High Sensitivity: Our Water Flow Sensor Switch is designed with high sensitivity to detect even the slightest changes in water flow. Durable Construction: Made from quality materials, this Water Flow Sensor is built to endure the challenges of regular use.This water flow is simple to install and features a durable impellers Easy Installation: This water sensor switch is designed for hassle free installation. Suitable for use in water dispensers, purifiers, and other household appliances, this water flow proveid accurate measurement and signal output. Energy Efficient: With its intelligent design, our Water Flow Sensor Switch operates with minimal power consumption. This not only makes it eco friendly choice but also helps in reducing your energy bills. Versatile Application: Whether monitor liquid flow rate in a water heaters or coffee machine, or trackings water usage in a filter manager or direct drink machine, this is for wide ranges of applications. Size Chart: Inner diameter 3.5mm:0.15-4L/MIN Inner diameter 1.2mm:0.05-1.8L/MIN Package Includes: 1pcsWater Flow ON-OFF Meter Note: Please allow slightly errors due to manual measurement and different monitors.