2" DC 5-18V Water Flow Sensor 304 Stainless Steel Flow Sensor Water Control Liquid Sensor Switch Valves: the water flow sensor is equipped with a valve head, which can be used to control the internal temperature of the water. 304 stainless steel liquid sensor switch: the stainless steel liquid sensor switch is resistant to corrosion, rust and other high temperature environments. Small small size: small size, easy to carry and store, can be used for a long time without taking up too much space. 304 stainless steel material / widely used