What is Reddit's opinion of
Apera Instruments pH Pen Tester Kit?
From 3.5 billion Reddit comments
1 review of this product found across Reddit:
1 point
·
29th Oct 2021
https://www.amazon.com/Apera-Instruments-Pen-Tester-Kit/dp/B07BV1XZD2
Replacable probes, 1 point calibration, less than $100.
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