I accidentally fell down a deep rabbit hole while trying to figure out how pH meters work. I thought this would be a really nice simple example of a scientific instrument, suitable for didactic explanation as part of an exposition of the failures of logical positivism. FAIL
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I will claim to know what I'm talking about only in that I have plenty of experience yelling at them and buying replacement electrodes. My electrochemistry skills are adequate to maintaining an industrial anodizing line, but not to *understanding* a pH meter.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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I used to use them for chemical weapons testing (long story, not especially relevant): I found Omega to be a) the most reliable and b) the most helpful. https://www.omega.co.uk/prodinfo/ph-meter.html# …
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But for failures of logical positivism, perhaps look at Navier-Stokes equations - very topical currently - or the ‘science’ of low-metal content mine detection, which employs all sorts of not-verifiable science. https://www.rand.org/content/dam/rand/pubs/monograph_reports/MR1608/MR1608.ch2.pdf …
End of conversation
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