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Old September 2, 2019   #9
brownrexx's Avatar
Join Date: Feb 2016
Location: Southeastern PA
Posts: 1,371

I worked in a chemistry lab for years and our pH meters cost about $2500 each and the probes were $100 each and had to be replaced frequently. Each meter uses 2 probes.

The meters were calibrated with 2 standards every 8 hours to assure accuracy.

No home pH meters are going to give you much accuracy but pH paper should be fine although many of them only read in whole numbers and there can be a big difference between something like 7.0 and 7.9 so buy paper that reads to one decimal place.

Last edited by brownrexx; September 2, 2019 at 08:46 AM.
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