Water Flow Sensor

Introduction

The Water Flow Sensor measures the rate of water flow through a pipe. It is commonly used in irrigation systems, water dispensers, and liquid flow monitoring. The sensor outputs a pulse signal proportional to the flow rate.

Features

• Measures water flow rates from 1 to 30 liters per minute (L/min).
• Output: Digital pulse signal proportional to flow rate.
• Compact and durable design.
• Operates at 5V DC.

Pinout

Working Principle

The Water Flow Sensor consists of a turbine wheel, a hall effect sensor, and a housing. When water flows through the sensor, the turbine wheel rotates. The hall effect sensor detects the rotation and outputs a pulse signal proportional to the flow rate. By counting the number of pulses, the flow rate and total volume can be calculated.

Arduino Example Code

const int flowPin = 2;  // Pin connected to the sensor's yellow wire
volatile int pulseCount = 0;

void setup() {
    Serial.begin(9600);
    pinMode(flowPin, INPUT_PULLUP);
    attachInterrupt(digitalPinToInterrupt(flowPin), countPulses, FALLING);
    Serial.println("Water Flow Sensor Initialized");
}

void loop() {
    pulseCount = 0;  // Reset pulse count
    delay(1000);     // 1-second interval

    float flowRate = pulseCount / 7.5;  // Convert pulses to liters/min
    Serial.print("Flow Rate: ");
    Serial.print(flowRate);
    Serial.println(" L/min");
}

void countPulses() {
    pulseCount++;
}
    

Sensor Image