The power of Hydrogen in any liquid can be measured with a total pH scale range of 0-14 where 7.0 is considered as a neutral value. The pH electrode has a single cylinder that allows direct connection to the input terminal of a pH meter, controller, or any pH device which has a BNC input terminal. You can just connect the pH sensor with a BNC connector, and plug the PH2.0 interface into any analog input on the Arduino controller to read pH value easily but you have to calibrate it before use if the pH probe was kept long. Calibration can be done via software or using a potentiometer present on the device.

SPECIFICATION :- 

• Heating Voltage :- 5V ± 0.2V DC/AC
• Current :- 5-10mA
• Detection concentration range :- PH0-14
• Detection range of temperature :- 0-80°C
• Response time :- ≤5s
• Stability time :- ≤60s
• Power consumption :- ≤0.5W
• Working Temperature :- -10~50°C
• Working Humidity :- 95% RH
• Service life :- 3 years
• PCB Size :- 42mmx32mmx20mm
• Output :- Analog voltage signal

PINOUT :- 

• TO :- Temperature output
• DO :- 3.3V pH limit trigger
• PO :- pH analog output
• GND :- GND for pH probe
• GND :- GND for board
• VCC :- 5V DC
• POT1 :- Analog reading offset(Nearest to BNC connector)
• POT2 :- pH limit setting

(Note: Product Image are shown for illustrative purposes only and may different from the actual product)