Hanna Calibration Fluid pH 4.01 – 20ml

The packaging is light and airtight, so they have a long shelf life
Manufactured in accordance with ISO 3696 / BS39878 standards
Color coded label for easy pH buffer value indication
Accuracy of +/- 0.01 pH at 25 ° C
Temperature chart of the actual pH value at the different temperatures is displayed on each pouch.
Hanna Instruments buffer solutions do not contain dyes that can affect the reference cell of a pH electrode
The solution can be kept for 5 years after production
Each package is provided with a specific lot number