How to Build a pH Meter using Arduino

Here we build an Arduino pH Meter and learn how to measure the pH of a liquid solution using a gravity pH sensor and Arduino. A 16x2 LCD is used to show the pH value on the screen. We will also learn how to calibrate the pH sensor to determine the accuracy of the sensor.

[simonmikai]

sir everytime you immersed ph sensor into different solution, do you always press the reset button?

[syafiqahzawanah]

i tried to connect the pH sensor board and the lcd to the 5v pin in arduino..But the pH value stated is 1.09 ? What should i do ?

[reybiokimiko]

Hi, I'm not an expert in programming, I construct a DIY bioreactor and I measure pH and temperature with two different sensors but I have a problem, I know that the temperature and pH have a correlation but when I heat the temperature sensor with my hand, the pH increases on the screen even when the sensor is stored in its solution. This situation happens when the temperature changes from 20°C.

[mohishkhadse]

Sir where i can get that ph sensor library

[mousumichakraborty]

sir I am getting no display in the lcd. plz help me

[a-gc]

Sir iam getting same ph values for clean water and muddy water

[kylenikko]

is it applicable to measure ph in soil?

[herbertpananganan]

Good Day Sir! I really appreciate and am really grateful for you to be sharing this project with us, Thank you, kind Sir! But I do have a query sir, when I test my sensor, negative values appear or sometimes they appear in three decimal places and the values don't seem to go up? Is this normal or is there someway I can fix this sir? Hoping for your reply, Thank you and have a nice day Sir!

[moinuddinm]

Is it possible to connect this device to smartphone.. and check reading on smartphone

[m_nura]

how to connect to 16×2 Led send me sir

[riverman]

I sure wish I could understand this fella. And closed captions are off.
Just sayin..

[petermccool]

I honestly learned nothing. Where's the project notes, hardware explanation, the coding? Useless waste of time.