Hi, I'm making a project with arduino that monitor my reef aquarium. So one of the things that I have is PH monitoring. To do that, I have the Atlas Scientific Ph Stamps: http://atlas-scientific.com/product_pages/embedded/ph.html My connection is like this: [image] When I mesure the PH insid…

Arduino + PH probe in Aquarium. Ground Loop. Please help.

system December 9, 2012, 8:53pm 4

For someone familiar with electronics, two optocouples like the schematics I linked, is not hard.
I'm sorry but I can't find a ready-to-use board on Ebay.

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Arduino + PH probe in Aquarium. Ground Loop. Please help.

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