Item Type: Hall Flow Sensor_x000D_Material: POM_x000D_Interface Size: G3/8 pipe_x000D_Voltage Range: DC3.5-24V_x000D_Inner Diameter: Approx. 5mm / 0.2in, Outer Diameter: Approx. 9.5mm / 0.37in_x000D_Flow Range: 0.3-10L/min_x000D_Pulse Frequency: F=(10xQ)5%_x000D_Withstand Voltage: 1.75map_x000D_Output Pulse High Level: DC4.6V (input voltage DC5V)_x000D_Output Pulse Low Level: DC0.5V (input voltage DC5V)_x000D_Maximum Operating Current: 15mA (DC5V)_x000D_Operating Temperature Range: 80 1EASY TO INSTALL: Hall flow sensor is light weight, small size, provide simple installation, easy to carry and use 2WATERPROOF AND WEAR RESISTANT: Hall component adopt waterproof design to prevent water ingress, good quality material is inlaid inside the impeller, durable and wear resistant 3THREE WIRE CONNECTION: Red is positive, black is negative, yellow is pulse signal, different color is clear for you to distinguish 4WATER FLOW SWITCH: The water flow sensor is applied to the water heater and can be used as a flow switch, useful and practical 5IMPACT STRENGTH POM: Made of good quality POM material, has good fatigue resistance and impact strength, good creep resistance1 x Hall Flow Sensor