TDS Sensor Arduino, TDS in Water PPM Value, Total Dissolved Solids, Water Quality Monitoring

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Project Description:
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Declining water quality has become a global issue of concern as human populations grow, industrial and agricultural activities expand, and climate change threatens to cause major alterations to the Hydrological cycle. Every year, more people die from unsafe water than from all forms of violence, including war. Have you ever tried to find out what is the pH value and TDS value of the water you are drinking? Using a pH sensor and a TDS Sensor you can make a perfect water quality monitoring system. I have already used the pH sensor with Arduino and Nodemcu esp8266 wifi Module for measuring the water quality you can find links in the description.

In today’s episode, you will learn how to make a water quality monitoring system using the Gravity TDS Meter V1.0, DS18B20 Waterproof one-wire digital temperature sensor and 16x2 LCD with Arduino for measuring the TDS value. TDS stands for Total Dissolved Solids. The TDS value as you can see on the LCD screen indicates how many milligrams of soluble solids are dissolved in one liter of water. Many TDS meters display the TDS value in ppm which stands for parts per million. In general, the higher the TDS value, the more soluble solids are dissolved in water, and the less clean the water is. Right now the water under test is excellent as the TDS value is less than 300. The TDS value starts increasing as I start adding the salt. So, using this small DIY low-cost TDS meter you can find out if the water you are drinking is clean or not.

Along with the TDS value, you can also see the EC and temperature values which I will explain in a minute. I will also explain what TDS value is good for drinking water? I will explain all the three parameters in detail.

You can also use a TDS pen which is quite cheap and can be used for measuring the TDS value. But, if you are planning to make a hydroponic system that maintains a certain ph level then the TDS pen will never work. Because for hydroponic systems you will need an automatic system that can turn on and turn off other electrical devices. Moreover, you cannot use this TDS pen in IOT based projects.

But this TDS meter can be used in automatic Hydroponic and IOT based water quality monitoring systems.

Without any further delay let’s get started!!!


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Amazon Purchase links:
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Arduino Nano USB-C Type ( recommended):

ESP32 WiFi + Bluetooth Module for iOT Projects (recommended), more IO pins, improved speed, and supports a Lipo Battery:

TDS Meter V1.0 Dfrobot:

TDS Pen:

16X2 LCD

LCD 16x2 i2c:

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#tds #waterquality #tdsmeter

[bigsteve]

Great video you have a good voice for teaching, but like others mentioned, the device says it only measures up to 1000ppm, how is it displaying higher than this and a 2.3 EC this is way higher than 1000ppm. You even mention the max output is 1000ppm, so if the full voltage at 5v is 1000ppm how is it reading higher on the video. Thank you

[JoseAntonio-rckg]

Ótimo projeto e muito bem explicado. Abraço!

[raymissa]

Correct me If I'm wrong :
The TDS Sensor you're using has a maximum reading range up to 1000 ppm, right? I just wanted to know how come it could have a reading up to 1195 ppm at 1:48 ?
Hope this question is not offending :/

[gauravsaraswat]

superb explanation ... great job !! Thanks :)

[OryzaComputer]

I'm not speaking English but no problem because i still understand whats your mind, this video very helpful for me, I want make a simple gardening with this tools, thank you so much :)

[rezaramadhani]

Thank you sir, but i wanna ask you about how sensor tds can read >1000ppm meanwhile maximum range is 1000 ppm ? thank you sir hope you reply my question

[aldiprasetyo]

can I calculate ppm in the range of 1200 - 1800 using this tds sensor?? if not, what sensor should I use to calculate the ppm with that range

[mulyach]

Great video.
The product spec mention that measurement range is up to 1000ppm. But, in your video, it shows >1100ppm. Can I can how is it possible?
Thanks

[thuchuynh]

let me ask what is the formula for converting TDS to EC? Thank you very much

[fatiheneskuru]

the effect of sugar on tds value is depedant on the concentration of water percent of solution so major increase in sugar may have small effects on tds value but i guess this must not be a problem for a hydroponic system.

[green]

how u get reading more 1000ppm, what i see data sheet on tds sensor is 0 - 1000 ppm only

[valorantasik]

Hi, i got gravity tds meter from DSRobot. It has sensor range from 0 to 1200 ppm, but my sensor sometime can reach to 1800 ppm (9 times in 147 running), can you suggest what should i do? this is for my univ project :) thankyouu

[myliner]

Good day
Is it possible to add more sensors to provide more data on the water quality ? I suppose whatr Im asking is can the system be expanded on ?

[arielsipayung]

I want to ask sir, what software did you use to make the schematic circuit?

[rafigarden]

how can i replace the pcb board because i dont have access to order pcb board

[pdeepakjayan]

how to decide kc value? Please explain

[juanandresvillalbafranco]

Why your aref = 4, 3 volts ? shouldn't it be 5 volts?

[youssef]

Could you give me TDS Sensor Library for Proteus

[zakirshah]

How can I send both sensors data to firebase plz guide

[chimpofm]

a great video, really helpful good work. drop me a meassage later, you have dissapeared from fb,