Dermal pH meter

Using Arduino Sensors
1

Hi everyone,
is it possible to measure skin pH with arduino pH module or it can only be used for measuring pH of liquids?
If not can do you have any suggestions?
Thanks

2

ivan112:
Hi everyone,
is it possible to measure skin pH with arduino pH module or it can only be used for measuring pH of liquids?
If not can do you have any suggestions?
Thanks

I may be wrong, but, I think ph is a relative number for the number of hydrogen ions in a solution. Do you have hydrogen ions in/on your skin?

Paul

3

Paul_KD7HB:
I may be wrong, but, I think ph is a relative number for the number of hydrogen ions in a solution. Do you have hydrogen ions in/on your skin?

Paul

Yes you do. Anywhere you have water, you have hydronium ions and hydroxide ions. Even the water in your skin.

OP, what module are you talking about? When I google "Arduino pH module" I get lots of different options. I don't think that there is an official Arduino product in there. So which one are you talking about?

4

Well, this is such a simple case of "get the proper sensor".

I am aware of pH probes for liquids and soil, so not too surprising there are pH probes for skin. A pH probe that's designed for soil won't do well in liquid, and the other way around. Likewise, neither will do well for measuring skin. A pH probe for measuring skin pH would not do well in water or soil, either.

So that's your first step. Find sensors that can measure what you want to measure. Then find out how (and if) they can be interfaced with an Arduino board.