DC3.5V 5-12V YF-S401 Mini Impeller Type Water Flow Sensor Water Purifier Hall Sensor 0.3-6L/min Coffee Machine Flowmeter Connected to 6mm Hose

The water flow sensor is mainly composed of a plastic valve body, a water flow rotor assembly and a Hall sensor. It is installed at the water inlet end of the water heater to detect the water flow rate. 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. The device judges the size of the water flow and regulates it. Product Features 1. The appearance of this product is light and flexible, small in size, and easy to install. 2. The impeller is inlaid with a stainless steel shaft, which penetrates up and down to disperse the stress points and is always wear-resistant. 3. The sealing ring is made of nitrile rubber imported from Japan, and the upper and lower force structure never leaks. 4. The Hall element is imported and encapsulated with potting glue to prevent water ingress and never age. 5. All raw materials meet ROHS testing standards Scope of application: Suitable for water heaters, credit card machines, automatic water vending machines, and other flow measurement equipment! Output waveform: square wave Lead wire method: 1 Red IN connect to positive pole 2 Yellow OUT signal output line 3 Black GND connect to negative pole 4 Green R Temperature sensor (3950K 50K or 3950K please choose according to your own requirements) Frequency: F=5.5*Q(L/Min)-3 Error: ±2% Voltage: 3.5-24VDC, current cannot exceed 10mA, output 330 pulses after flowing one liter of water. That is, frequency calculation = constant 5.5* unit flow rate (L/min) * time (second) -3 Precautions for use: Severe impact and chemical erosion are strictly prohibited. Throwing or collision is strictly prohibited. The temperature of the medium should not exceed 120 degrees