Review on 📈 High Accuracy Digital pH Meter with ATC Tester - 3 in 1 Pen Type for Water, Wine, Spas, Aquariums - 0.01 pH Resolution, TDS & Temp Measurement by Karen Perez

This pH meter came with calibration powder and instructions on how to calibrate and use this meter. I love this thing, it's accurate and very easy to use. To test accuracy, upon receipt I ran it through vinegar, lemon juice, and milk, then made a batch of barbecue sauce. After that was done I checked my readings, recalibrated and re-measured, and tested a few different glasses a third time and each time they read in the 3.20 to 3.26 ph range. So it's very accurate. And for me it's worth its weight in gold.