Flow sensor 0.3-6l/min, YF-S401, 120 degrees

Liquid flowmeter sensor with stainless steel ball inside, with flow measurement by Hall element.

The pump is installed vertically, without exceeding a maximum inclination of 5 degrees, for correct operation.

The pump is resistant to liquids with a maximum temperature of 120 degrees C.

The sensor transmits a signal in the form of PWM (Pulse with Modulation) on the yellow wire, generated by the Hall sensor that is activated by the rotation of the rotor. Depending on its rotation speed, a variable pulse width will be obtained.

Specifications:

Supply voltage: 6V

Output signal: PWM

Measured flow: 0.3 - 6L/min

Pressure: <0.8MPa

Maximum current: 15mA at 5V

Operating temperature: <80 degrees C

Humidity: 35 - 90%

Dimensions mm: 58 x 34 x 27mm

Outer tube diameter: 7mm

Inner tube diameter: 3mm

Login:

Red: 6VDC

Black: GND

Yellow: PWM signal

Use:

To be used together with Arduino, connect the power (Red wire) to 5V , the Black wire to GND , the Yellow wire to digital pin 2 . A 10K PullUp resistor will be added between pin 2 and 5V to prevent the float effect on digital pin 2 and implicitly block the returned value.

Open the Arduino IDE and compile the following code (which you can also find in text form in the Download section:

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int flowPin = 2; //Input pin

double flowRate; //Value to be calculated

volatile int count;

void setup() {

// put your setup code here, to run once:

pinMode(flowPin, INPUT); //Set pin as Input

attachInterrupt(0, Flow, RISING); //Setup interrupt 0 on pin 2 for the Flow function

Serial.begin(9600); //Start Serial

}

void loop() {

// put your main code here, to run repeatedly:

count = 0; // Reset counter

break(); //Enable interrupted

delay(1000);

noInterrupted(); //Disable interrupted

//Start the math

flowRate = (count * 2.25); //calculate the flow rate

flowRate = flowRate * 60; //convert seconds to minutes

flowRate = flowRate / 1000; //convert ml to L

Serial.println(flowRate);

}

void Flow()

{

count++; //increment count by 1

}

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