Note: Recommended additional products: pH meter buffer solution 7.01, pH meter buffer solution 4.01, storage solution for pH meters, electrode cleaning solution, located in the related products section (to the left) for easy ordering.
Calibrated and worked great!
Checker 1 Economical pH Tester
I have some trouble doing the 2 point calibration setup, so I just use 7.01 solution. (it is a problem I have understanding the directions) That said, it works great.
Works well enough for the amateur winemaker-good measurements to the tenth, not hundredth. If you're working in a winery, you'll want something higher end.
I have only used it twice but so far I am very pleased with it