[PIC] pH Meter Value Conversion

[FvM]

Most likely, the numbers are hypothetical (wrongly calculated) values, at worst erroneous measurements, in any case they are wrong.

 

[pic.programmer]

@FvM

What values are wrong ? Mine or hers ?

@KamW

Ok. What is the best method to design the pH Probe Interfacing Circuit using OpAmp ? What OpAmp sub-circuits do I need ?

pH probe gives 60 mV/pH

pH scale is from 0 to 14

0 is strong acid and 14 is alkaline

Now she said that she is using a pH probe Calibrator circuit and provided this circuit. Will this produce the voltages that she mentioned ?

 

[KamW]

measurement results are OK. your assumption in simulations are wrong.
I think you should read about pH electrodes. The best google show it is **broken link removed**

 

[c_mitra]

pH scale is from 0 to 14

pH scale is theoretically from -inf to +inf. It is easy to get a pH of -1 (using conc HCl and water) or a pH of 15 (using conc KOH). What will be the pH of CCL4?