Introduction

This Gravity: liquid flow sensor is designed based on the electromagnetic principle. It adopts O-ring rubber seal and uses silicone sealant at the outlet end to strength water-resistance. With high anti-interference and anti-impact, the sensor offers reliable performance and long service life. Also, it is designed with G1/4 thread connectors for easy installation.
The sensor can be used with microcontrollers like Arduino UNO to measure the flow of liquids with high concentration and low viscosity like water, diesel, engine oil, milk, paint, detergent, honey, etc. (no impurity in liquid)

Features

• Gravity connector, easy to wire
• Wide voltage of 3.5-24V
• Supports measuring liquid with high concentration and low-viscosity
• RHOS compliant

Specification

• Operating Voltage: DC3.5-24V
• Operating Current: ≤10mA（DC5V）
• Output: NPN Pulse signal
• Pipe Diameter: G1/4”
• Thread Outer Diameter: 13mm
• Thread Length: 10mm
• Water Pressure Resistance: ≤1.0MPA
• Insulation Resistance: ＞100MΩ
• Error: ±1%(0.3-5L/min)
• Output Pulse High Level: ＞DC4.7V(Input voltage DC5V)
• Output Pulse Low Level: ＜DC0.5V(Input voltage DC5V)
• Output Pulse Duty Ratio: 50%±10%
• Flow-Pulse Correlation: 1L=540 pulses
• Operating Temperature Range: -10°~70°C
• Operating Humidity Range: 35%~90%RH(No condensing)
• Storage Temperature: -25°~+80°C
• Storage Humidity: 25%~95%RH
• Dimension: 804730mm/3.151.851.18”

Board Overview

Dimension

Tutorial

Requirements

• Hardware

  • DFRduino UNO R3 (or similar) x 1
  • Water Flow Sensor x1

• Software

  • Arduino IDE

Connection Diagram

Sample Code

volatile double waterFlow;
void setup() {
  Serial.begin(9600);  //baudrate
  waterFlow = 0;
  attachInterrupt(1, pulse, RISING);  //DIGITAL Pin 3: Interrupt 0
}
void loop() {
  Serial.print("waterFlow:");
  Serial.print(waterFlow);
  Serial.println("   L");
  delay(500);
}

void pulse()   //measure the quantity of square wave
{
  waterFlow += 1.0 / 540.0; // 1L=540 pulses
}

FAQ

For any questions, advice or cool ideas to share, please visit the DFRobot Forum.

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