pH Buffer Calibration Solution 3-Pack: pH 4.00, pH 7.00, pH 10.00 Buffers — 500 mL (1.06 Pint) Each — Color Coded — NIST Traceable for All pH Meters

Works great.

Works great 💪

Quality product and good value. Easy to use and very accurate. Performs well.

These came clearly marked and the different colors add to the security of using the correct product for the calibration.

Works

Works for the purpose of general laboratory pH meter calibration, good value for the money. Containers are easy to open, and the quality is good. The presented Appearance / Color is based on the amount of pigment / dye / or contents used, when placed into 30mL sample vial the color is more opaque.

I use this solution to calibrate all of my various ph meters & it works as it should. The solutions are the accurate ph. I have not tried to use it to calibrate the one meter I have that requires slightly different ph levels than the ones included.

Bought this set for a brewery and they are exactly what I needed for PH testing.