Car Guardiance Digital PH Meter, PH Meter 0.01 PH High Accuracy Water Quality Tester with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium Water PH Tester Design with ATC

I'm trying to test the pH of my kombucha. After 30 seconds, it tested it at a 2.55 and when I take the pH monitor out and put it back in for 30 seconds, it reads 3.1. It is always giving different results every time I test the same cup. What a waste.

Piece of crap, won’t hold a Calabration, bought Calabration Fluid, still won’t Calibrate correctly, don’t buy, Amazon no return on this Product...

Did not work. Would turn on and Display numbers in the 10 to 11 range. Calibration button would not work. Reading would not change when inserted into different liquids with different ph levels. Not usable.

These things don't last more than a month, I went through two already. These are of very low quality.

Works great

We bought 3, used all three at the same time on bottled water advertised as 8 ph and got readings of 5.8, 4.32, and 6.19. Then we tried a minute later and got readings of 6.28, 5.12, and 7.12. Waste of money!

Works great, would buy again

Works fine for me. Seems no matter what brand, reviews are bad.