Review on Precision Handheld Conductivity Detector Graphite by Scott Rodriguez
This is NOT a PH pen! This is just a TDS handle.
This item is labeled '3-in-1 Precision Hand Water Quality Check Pen' but does not measure PH at all. It's just a TDS meter. Also, the "English" manual has very bad grammar.
- Dope π₯
- Expensive
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