Item Type: Water Flow Sensor Output Signal: Output NPN pulse signal. Model: YF-G1 Interface Size: 1.3in british system male external thread. Rated Voltage: 3.5-24VDC Water Inlet Inner Diameter: Approx. 22.7mm / 0.9in Water Outlet Inner Diameter: Approx. 20.9mm / 0.8in Water Outlet Outer Diameter: Approx. 32.8mm / 1.3in Thread Length: Approx. 23mm / 0.9in Material: Nylon Water Pressure Resistance: ≤2.0MPa Output Pulse High Level: >DC4.5V (input voltage DC5V) Output Pulse Duty Cycle: 50%±10% Load Capacity: ≤10mA (DC5V) Flow Range: 2~100 L/min ± 3% Tightness: Close each hole, add 1.7Mpa water pressure test for 1 minute, no leakage and deformation. Flow Pulse Characteristics: (Hz)=(1.08xQ)±5% (Q is flow rate L/min) 1、For Flow Sensing: When the water passes through the water flow rotor assembly, the magnetic rotor rotates and the speed changes with the flow rate. The Hall sensor outputs the corresponding pulse signal and feeds it back to the controller to judge the size of the water flow and adjust it. 2、Water Flowmeter: Mainly composed of a valve body, a water flow rotor assembly and a Hall sensor. 3、Wide Application: Used in petrochemical industry flow control, farmland and garden irrigation, etc. 4、Premium Material: Adopting premium nylon material, the flow meter ensures secure and stable sealing. 5、Easy to Install: Comes with a light weight and a small size, very convenient to store and install. 1 x Water Flow Sensor