Calibration solutions pH 4, 7 and 9 (250 ml)

Calibration solutions pH 4, 7 and 9 for calibrating measuring instruments.

The calibration solutions are in a practical dosing bottle for easy and clean calibration.
No more decanting into other containers is necessary.

To calibrate, simply fill the reservoir by gently squeezing the bottle. Calibrate the electrode in the reservoir. Then empty the reservoir. This way you always have a safe and clean solution for calibration.