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Soil ph meter


neonwarrior
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Hello everyone,

Could you possibly enlighten me which principle soil ph meters use?

I understand that they have an aluminum and copper electrodes. But I cannot find any information about this one (only the one with silver wire coated with AgCl)

Thanks in advance

 

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10 hours ago, neonwarrior said:

Hello everyone,

Could you possibly enlighten me which principle soil ph meters use?

I understand that they have an aluminum and copper electrodes. But I cannot find any information about this one (only the one with silver wire coated with AgCl)

Thanks in advance

 

I'm not sure, but I think that they rely on the fact that the aluminium corrodes faster in more acidic  soils and thus sets free more electrons which pass through the meter and give a larger reading.

Or they may work on a  principle is similar to this.

https://en.wikipedia.org/wiki/Antimony_electrode

41 minutes ago, Bufofrog said:

It depends on your needs, but it is much less expensive to buy kits for testing pH than to buy a pH meter.  

How would that help find out how the meter works?

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