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Question about water parameter test

340 Views 5 Replies 5 Participants Last post by  Master503
Hi

I noticed on ebay there is pH digital Pen test (similar like TDS pen), does this one work accurate?
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Not really.
They are very inaccurate.
The better ones that are sold for more than $175.00 with probe, storage, and calibrating solution, are more accurate.
Not really.
They are very inaccurate.
The better ones that are sold for more than $175.00 with probe, storage, and calibrating solution, are more accurate.
Agreed! I had one of the inexpensive ones, and you'd have to let it settle for up to 15 minutes to get a reading. It just wasn't worth it at all. I ended up adding another pH probe to my Apex controller and monitoring that way.
those pens are cheap for a reason. I bought one before and it's very inaccurate even after re-calibrating.
Thanks all, great thoughts. I will continue to use the liquid test.
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