Flow sensors for measuring the flow rate, it operates based on the Hall effect and is made of food-grade POM material. It offers a voltage range of DC3-24V and the flow rate range have 4 types :0.15-1.5L/min | 0.25-2.5L/min | 0.3-3.0L/min |0.3-4.5L/min . With a precise detection accuracy of 10%, it is specifically designed for water purification equipment and so on.For mort details,please feels free too Contact us!