This set contains three bottles of pH calibration solution (pH 4.01/ pH 7.00/ pH 10.01) and one bottle of 3M KCl storage solution, each containing 250ml. In addition, a Calbox is included, which can be filled with up to four different solutions and makes calibration much easier.

• Solutions: pH 4.01 / pH 7.00 / pH 10.01 + 3M KCl storage solution, 250ml each
• Precise calibration: Accuracy of pH 0.015 allows highly accurate calibration
• Easy recognition: Based on the colors, you can recognize the correct solution at a glance (pH 4: red, pH 7: green, pH 10: blue)
• The 3M KCl storage solution preserves the sensitivity and accuracy of pH / ORP electrodes
• Use immediately: Instead of dissolving powder in distilled water first, you can use these solutions immediately
• Long shelf life, batch certificates available on the Internet
• The Calbox has space for 4 solutions and caps that can be closed, simplifying each calibration