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

In this article I have explained how to 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
  1. #define ECHOPIN 03                            // Pin to receive echo pulse  
  2. #define TRIGPIN 04                          // Pin to send trigger pulse  
  3.   
  4. void setup(){  
  5.   Serial.begin(9600);  
  6.   pinMode(ECHOPIN, INPUT);  
  7.   pinMode(TRIGPIN, OUTPUT);  
  8.   pinMode(13, OUTPUT);  
  9.   pinMode(12, OUTPUT);  
  10. }  
  11.   
  12. void loop(){  
  13.   digitalWrite(TRIGPIN, LOW);                   // Set the trigger pin to low for 2uS  
  14.   delayMicroseconds(2);  
  15.   digitalWrite(TRIGPIN, HIGH);                  // Send a 10uS high to trigger ranging  
  16.   delayMicroseconds(10);  
  17.   digitalWrite(TRIGPIN, LOW);                   // Send pin low again  
  18.   int distance = pulseIn(ECHOPIN, HIGH);        // Read in times pulse  
  19.   distance= distance/58;                        // Calculate distance from time of pulse  
  20.   Serial.println(distance);                     // print distance  
  21.   delay(50);                                    // Wait 50mS before next ranging  
  22.   digitalWrite(13, HIGH);    // set the tank meter board LED on  
  23.   digitalWrite(12, HIGH);   // set the Arduino onboard LED on  
  24.   delay(1000);              // wait for a second  
  25.   digitalWrite(13, LOW);     // set the tank meter board LED off  
  26.   digitalWrite(12, LOW);    // set the Arduino onboard LED off  
  27.   delay(1000);              // wait for a second  
  28.     
  29. }  
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