PH buffer solutions for calibration

Calibration (buffer) solutions of PH 4, PH 7 and PH 9 for calibration of sensors, pH electrodes.

Buffer solutions PH 4, PH 7 and PH 9 are intended for calibration and maintenance of pH sensors (electrodes).

Color differences of calibration solutions:

  • Calibration (buffer) solution pH 4 : a solution of pale red (pink) color;
  • Calibration (buffer) solution pH 7 : a solution of a pale green color;
  • Calibration (buffer) solution pH 9 : a pale blue solution;

Supply : 55 ml plastic bottle.

We recommend calibrating the pH electrode once a month.

Name Article Price without VAT, (€)
Calibration solution pH 4, 55 ml ASZ0000101 9
Calibration solution pH 7 , 55 ml ASZ0000201 9
Calibration solution pH 9 , 55 ml ASZ0000301 9

Store calibration solutions in a dark place, at a temperature not exceeding 25° C, away from direct sunlight to prevent a photochemical reaction. In addition, buffer calibration solutions must be protected from carbon dioxide from the air and stored in tightly closed, sealed containers. The labeling of each plastic bottle indicates the validity period of this calibration solution.