Published February 17, 2020 © CC BY-NC-SA

Measure Water Pollution and Plot Data Online

In this tutorial you will learn how to use a DIY water probe - great activity for students to learn about water quality and environment!

BeginnerFull instructions provided740

Measure Water Pollution and Plot Data Online

Things used in this project

Hardware components

Arduino UNO Wifi Rev.2

5x7cm PCB

Chassis mount binding post Solid core wire

Resistor 10k ohm

Male headers strips for arduino

Story

In this tutorial you will learn how to use a DIY water probe.

You will find information about what the water probe is for, how it works, what experiments you can run with the water probe in order to understand what water pollution is. Finally, you ll learn how to plot the data recorded by the water probe on a shared online map, so that your work will be visible to anyone.

1 / 8

Step 1: Assembling the Water Probe

For a full tutorial on assembling your own water probe based on arduino uno, click here.

Step 2: Plotting Data on a Shared Online Map

1 / 5

You will be sharing the data recorded by your water probe on UMap, which allows users to create their own maps embedding the data of their choice.

First, head to https://umap.openstreetmap.fr/en/.

You will need to create an account to be able to edit your own maps.

Once you ve successfully logged in, hit the “Create a map” button.

You can now draw markers and enter the description you wish to publish.

For example, let’s enter the value recorded by our water probe at Lake Harriet, in Minneapolis.We’ve recorded 100 microsiemens, which by the way means that it is safe to bathe in Lake Harriet!

To share this map with anyone, you just need to provide them with the appropriate link.

Go to Update permissions and editors.

You can choose who can view and who can edit this map. To enable editors to edit the map, copy the link of your map (the web address of your map) and share it with whoever you want.

This tutorial has been produced as part of the DEEDU project, co-financed by the Erasmus + Programme of the European commission. Project n°: 2018-1-FR02-KA205-014144.

The content of this publication does not reflect the official opinion of the European Union. Responsibility for the information and views expressed therein lies entirely with the authors. For more information, email us at info@digijeunes.com.

Water probe

/*
 Water Conductivity Monitor
 Sketch for an Arduino gadget that measures the electrical
 conductivity of water.
 This example code is based on example code that is in the public domain.
*/
const float ArduinoVoltage = 5.00; // CHANGE THIS FOR 3.3v Arduinos
const float ArduinoResolution = ArduinoVoltage / 1024;
const float resistorValue = 10000.0;
int threshold = 3;
int inputPin = A0;
int ouputPin = A5;
void setup()
{
 Serial.begin(9600);
 pinMode(ouputPin, OUTPUT);
 pinMode(inputPin, INPUT);
}
void loop()
{
 int analogValue=0;
 int oldAnalogValue=1000;
 float returnVoltage=0.0;
 float resistance=0.0;
 double Siemens;
 float TDS=0.0;
 while(((oldAnalogValue-analogValue)>threshold) || (oldAnalogValue<50))
 {
 oldAnalogValue = analogValue;
 digitalWrite( ouputPin, HIGH );
 delay(10); // allow ringing to stop
 analogValue = analogRead( inputPin );
 digitalWrite( ouputPin, LOW );
 }
 Serial.print("Return voltage = ");
 returnVoltage = analogValue *ArduinoResolution;
 Serial.print(returnVoltage);

 Serial.println(" volts");
 Serial.print("That works out to a resistance of ");
 resistance = ((5.00 * resistorValue) / returnVoltage) - resistorValue;
 Serial.print(resistance);
 Serial.println(" Ohms.");
 Serial.print("Which works out to a conductivity of ");
 Siemens = 1.0/(resistance/1000000);
 Serial.print(Siemens);
 Serial.println(" microSiemens.");
 Serial.print("Total Dissolved Solids are on the order of ");
 TDS = 500 * (Siemens/1000);
 Serial.print(TDS);
 Serial.println(" PPM.");
 if (returnVoltage>4.9) Serial.println("Are you sure this isn't metal?");
 delay(5000);
}

Credits

EDUcentrum

0 projects • 15 followers

Measure Water Pollution and Plot Data Online

Things used in this project

Hardware components

Story

Step 1: Assembling the Water Probe

Step 2: Plotting Data on a Shared Online Map

Code

Water probe

Credits

EDUcentrum

Comments

Embed the widget on your own site

Measure Water Pollution and Plot Data Online

Measure Water Pollution and Plot Data Online

Things used in this project

Hardware components

Story

Step 1: Assembling the Water Probe

Step 2: Plotting Data on a Shared Online Map

Code

Water probe

Credits

EDUcentrum

Comments

Related channels and tags