1.Working principle:using the fluidity of water to make the magnetic rotor and magnetic induction sensor trigger induction, thus output a pulse signal. A)Real-time pulse signal is used to realize low flow start or water off protection; B)Using cumulative pulse number to realize water flow metering or management of filter elements and other related electrical devices. 2.Accurate Water Flow Meter: The quick Connect Water Flow Sensor is a reliable and precise flow meter that ensures accurate measurement of water flow in your appliances. With a wide flow range of 0.05～1.1L/Min , you can monitor and control the water usage with ease. 3.Safe and Easy Installation: Constructed with food-grade materials, this flow meter ensures safe drinking water while offering a hassle-free installation and removal process. It is suitable for 1/4" tubes, making it compatible with a wide range of appliances including water heaters, coffee machines, water purifiers, and more.