PH meter conversion of mv and ph value

The conversion between pH and mV is non-linear and depends on the specific model and calibration curve of the pH meter. Typically, a pH meter converts the measured potential value (mV) to the corresponding pH value based on a specific electrode response and calibration curve.

If you want to make a rough estimate of pH and mV, you can use the following formula as a reference: pH = K * (mV - V0)

Where K is the slope of the calibration curve (pH/mV) and V0 is the intercept of the calibration curve from the y-axis. These parameters will vary depending on the pH meter model and calibration process, so specific parameter values need to be referred to the pH meter's operating manual or consulted with the manufacturer.

Note that using the above estimation formula may introduce certain errors, because the relationship between pH and mV is nonlinear, and the accuracy and stability of the calibration curve also affect the conversion results. Therefore, in order to obtain more accurate results, it is recommended to calibrate according to the operating manual of the pH meter, and use the relevant functions or software provided by the instrument to read and calculate the pH value.