Top positive review
Accurate, easy to use pH calibration solutions. What more could you ask for?
Reviewed in the United States on December 3, 2017
Very straight-forward product. I've had no issues and these calibration solutions work perfectly, the first time, with no repeat calibrations needed so far. I use these with my Atlas pH probes and Atlas pH EZO interface boards. I use the three point calibration procedure which is nicely documented in a PDF on their website. Following this guide, you'll have no issues or second guess the accuracy of the probe!