convert mV <--> pH
Hi.
Please consider adding (after proper checking) to your measures conversion website, these formulas for the conversion from Voltage to Ph and vice-versa.
You can use a voltmeter (or a multi-meter, or multi-tester, set to measure Voltage) to measure the Voltage of a solution with respect to the Earth, and then use these formulas to get the Ph of the liquid (the measure of its acidity or alkalinity) from the value that you just have read in the voltmeter.
When the Voltage V is measured in millivolts (mV), which is the more practical measure, and it ranges between -400 and +400 mV:
1) Ph = 7 * ( 1 - V(mV) / 400 )
2) V(mV) = ( 1 - Ph / 7 ) * 400
When the Voltage V is measured in volts (V), and ranges between -0,4 and +0,4 V:
3) Ph = 7 * ( 1 - V(V) * 5 / 2 )
4) V(mV) = ( 1 - Ph / 7 ) * 2 / 5
Ph, or pH, indicates the concentration of hydrogen ions in a solution, and it ranges from 0 (acidic) to 14 (alkaline), and the corresponding voltages range from +400 mv down to -400 mV.
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Hi Edgar, thank you very much for suggesting this idea. We are currently working on a brand new version of the site and we will make sure to add this calculator to our new site.
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Dian Puji Hartono commented
thank you Sir.