Milwaukee MA9112 pH 12.45 Calibration Solution The MA9112 is a lab grade pH 12.45 buffer solution certified to meet the standard to an accuracy of ±0.01 pH. It removes inaccuracies involved with mixing buffers and is important for the correct use of electrodes and obtaining the most accurate and reproducible readings. Probe calibration is a simple procedure. For optimal performance it should be done any time readings become suspect or at least once a month. Simply open the solution, pour into a beaker or container, and insert the tester or electrode to start the calibration process. The solution is sealed with an airtight, tamper proof cap. Specifications: Accuracy: Standard ±0.01 pH pH Value: @25°C 12.45 Package: Bottles - size 230 mL Quantity: 1 Certificate of Analysis: No