Measure Water Level And Purity In A Tank With Arduino Mega 2560

Introduction

• In this article I have explained how to measure water level and purity in a Tank with Arduino Mega 2560.
  
• It can be used to give information about the purity of a tank and the water level. 

Parts

• Arduino Mega 2560
• SRF-05 ultra sonic
• LED-2
• Hookup wires  

SRF-05 Ultra sonic

• The SRF005 ultrasonic range sensor detects objects in it’s path.
• It can be used to calculate the range of the object.
• It is sensitive enough to detect a 3cm diameter broom handle at a distance of over 3m.   
        Figure 1: SRF-05 Ultra sonic

Connetion:

Step 1: Connection from Sensor to Arduino board

• Connect the Gnd of the sensor to the Gnd of the board.
• Connect the VCC of the sensor to the 5V of the board.
• Connect the triger of the sensor to the digital pin 03 of the board.
• Connect the echo of the sensor to the digital pin 04 of the board. 

Step 2: Connection From Leds to Arduino board

Led 1 connection: 

• positive pin = 13
• negative pin = Gnd 

Led 2 connection:

• positive pin = 12
• negative pin = Gnd

Programming

#define ECHOPIN 03                            // Pin to receive echo pulse
#define TRIGPIN 04                          // Pin to send trigger pulse

void setup(){
  Serial.begin(9600);
  pinMode(ECHOPIN, INPUT);
  pinMode(TRIGPIN, OUTPUT);
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
}

void loop(){
  digitalWrite(TRIGPIN, LOW);                   // Set the trigger pin to low for 2uS
  delayMicroseconds(2);
  digitalWrite(TRIGPIN, HIGH);                  // Send a 10uS high to trigger ranging
  delayMicroseconds(10);
  digitalWrite(TRIGPIN, LOW);                   // Send pin low again
  int distance = pulseIn(ECHOPIN, HIGH);        // Read in times pulse
  distance= distance/58;                        // Calculate distance from time of pulse
  Serial.println(distance);                     // print distance
  delay(50);                                    // Wait 50mS before next ranging
  digitalWrite(13, HIGH);    // set the tank meter board LED on
  digitalWrite(12, HIGH);   // set the Arduino onboard LED on
  delay(1000);              // wait for a second
  digitalWrite(13, LOW);     // set the tank meter board LED off
  digitalWrite(12, LOW);    // set the Arduino onboard LED off
  delay(1000);              // wait for a second

}

Explanation:

• It is used to check the range of the water in a tank
• The pulse and distance are shown in the serial monitor
• When the tank meter is on, led is ON
• When the tank meter is off, led  is OFF. 

Output

  
                                                 Figure 2 : Output