pH Sensor with Arduino, pH Sensor Calibration, pH meter, pH value of Liquids
pH Sensor with Arduino, pH Sensor Calibration, pH meter, pH value of Liquids
Read the Article: download circuit diagram and code
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Project Description:
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Recently, I got the Gravity Analog pH Sensor Kit V2 from the DFrobot. And let me tell you this is the upgraded version of the pH meter V1 that we could only use with 5V compatible controller boards like Arduino, Raspberry pi, and other 5V compatible controller boards , whereas the pH Meter V2 is compatible with both 5V and 3.3V compatible controller boards like, ESP32, Raspberry Pi Pico, STM32, ESP8266, etc.
You can only measure the pH value of water or any other liquid accurately if your pH probe is correctly calibrated. This is only possible when you use buffer solutions to calibrate the pH probe. Without these buffer solutions, you can never properly calibrate the pH probe. So, that’s why I ordered this complete kit. But, you can also purchase buffer solutions without purchasing the entire kit.
Open the Serial monitor and wait for at least 2 to 5 minutes until the pH value gets stable. Right now you can see, the pH probe has successfully detected the pH 7 solution, this is because; I have already calibrated it.
If you get a wrong value, simply adjust the calibration value in the program until the pH probe reading matches the buffer solution. This process should take around 5 minutes.
When you use buffer solutions, you need to clean the probe with water each time. Make sure there isn't any pH 7 solution on the probe when you dip it into the pH 4 solution, and vice versa...
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Amazon Purchase links:
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Arduino Nano USB C type (Recommended)
SSD1306 Oled Display Module
DFrobot Gravity pH Sensor Kit V2
pH Buffer Solutions
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