Digital Water Flow Sensor 1/8" 0.3-6L/min แรงดันต่ำกว่า 0.8 MPa (YF-S401)

1/8" Water Flow Sensor (YF-S401) เป็น Sensor สำหรับวัดอัตราการไหลของน้ำ (ยกเว้น น้ำกรด ด่าง และน้ำมันทุกประเภท ไม่สามารถใช้ได้) สามารถวัด Flow rate ได้ช่วง 0.3~6 L/min โดยมี Hall-Effect Sensor ส่งสัญญาณ Pulse Signal ออกมา

Introduction

The Water Flow sensor measures the rate of a liquid flowing through it. The YF-S401 water flow sensor consists of a plastic valve body, flow rotor and hall effect sensor. It is usually used at the inlet end to detect the amount of flow. When liquid flows through the sensor, a magnetic rotor will rotate and the rate of rotation will vary with the rate of flow. The hall effect sensor will then output a pulse width signal. Connect it to a microcontroller and you can monitor multiple devices such as your coffee maker, sprinkler or anything else, and control the water flow rate to suit your needs! 

• A 6 mm hose is recommended
• Avoid unit contact with corrosive chemicals
• The unit must be installed vertically, tilted no more than 5 degrees
• Liquid temperature should be less than 120 C to avoid damage to unit

Specification

• Inner Diameter: 4 mm
• Outside diameter: 7 mm
• Proof Water Pressure: <0.8 MPa
• Water Flow Range: 0.3-6 L/min
• Voltage Range: 5~12 V
• Operating Current: 15 mA (DC 5V)
• Insulation Resistance: >100 MΩ
• Accuracy: ±5% (0.3-3L/min)
• The Output Pulse High Level: >4.5 VDC (DC input voltage 5 V)
• The Output Pulse Low Level: <0.5 VDC (DC input voltage 5 V)
• Output Pulse Duty Ratio: 50% ± 10%
• Water-flow Formula: 1L = 5880 square waves
• Working Humidity Range: 35% ~ 90% RH (no frost)
• Dimension: 58*35*26 mm/2.28*1.37*1.02 inches
• Weight: 30g

Board Overview

Pulse Signal



Tutorial

In this Tutorial, we'll measure liquid flow using this sensor.

Requirements

• Hardware
  • DFRduino UNO R3
  • Water flow sensor
  • Jumper Wires

• Software
  • Arduino IDE, Click to Download Arduino IDE from Arduino®

Connection Diagram

Sample Code

 1 /***************************************************
 2  This example reads Water flow sensor Sensor.
 3 
 4  Created 2016-3-13
 5  By berinie Chen 
 6 
 7  GNU Lesser General Public License.
 8  See  for details.
 9  All above must be included in any redistribution
10  ****************************************************/
11 
12 /***********Notice and Trouble shooting***************
13  1.Connection and Diagram can be found here http://www.dfrobot.com/wiki/index.php?title=Water_Flow_Sensor_-_1/8%22_SKU:_SEN0216
14  2.This code is tested on Arduino Uno.
15  ****************************************************/
16 volatile double waterFlow;
17 void setup() {
18  Serial.begin(9600); //baudrate
19  waterFlow = 0;
20  attachInterrupt(0, pulse, RISING); //DIGITAL Pin 2: Interrupt 0
21 }
22 void loop() {
23  Serial.print("waterFlow:");
24  Serial.print(waterFlow);
25  Serial.println(" L");
26  delay(500);
27 }
28 
29 void pulse() //measure the quantity of square wave
30 {
31  waterFlow += 1.0 / 5880.0;
32 }