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- pH value: 4.01 / 7.00 + storage solution 3M KCl, 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)
- The 3M KCl storage solution preserves the sensitivity and accuracy of the pH / ORP electrodes
- Use immediately: Instead of dissolving powder in distilled water first, you can use this solution immediately
- Long shelf life, batch certificate available on the Internet
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