Feature: 1. USE PRINCIPLE: When the water passes through, the magnetic rotor rotates and the speed changes, the sensor outputs the corresponding pulse signal and feeds it back to the controller to judge the water flow. 2. SENSOR SPECIFICATION: The turbine water flow sensor has 3in male thread interface, the working voltage range is DC5-18V, and the output NPN pulse signal. 3. EASY INSTALLATION: The water flow sensor is light in weight and small in size, with standard size and good sealing, easy to install and does not take up space. 4. GOOD PERFORMANCE: The water flowmeter sensor is stable in operation, resistant to high temperature, and can be started at low water pressure, with strong practicability. 5. MULTIPLE USAGES: Can be used in water heaters, credit card machines, water vending machines, flow measurement equipment, etc., with a wide range of applications. Specification: Item Type: Water Flow Sensor Material: Aluminum Surface Treatment: Electroplating Output Signal: Output NPN Pulse Signal Model: YF -DN80 Interface Size: 3in Male Thread Working Voltage Range: DC5-18V Inner Diameter: Approx. 77mm / 3in Outer Diameter: Approx. 87mm / 3.4in Thread Length: Approx. 21mm / 0.8in Water Pressure Resistance: 1.75MPa Output Pulse High Level: >DC 4.5V (input voltage DC 5V) Output Pulse Duty Cycle: 50%±10% Load Capacity: ≤10mA (DC5V) Insulation Resistance: >100MΩ Flow Range: 20~500L/MIN Airtightness: Close each hole, add 1.7Mpa water pressure test for 1 minute without leakage and deformation Flow Pulse Characteristics: F=(0.5 x Q)±3%, F is frequency, Q is L/Min . Package List: 1 x Water Flow Sensor Note: 1. Severe impact and chemical erosion are strictly prohibited.2. Throwing or collision is strictly prohibited.3. Install in the direction of the installation arrows on the product.4. The medium temperature should not exceed 120℃.