Probe calibration is a simple procedure for optimal performance and should be done any time your readings become suspect. Calibration should be performed at least once a month.

MA9004 is a lab grade pH 4.01 buffer solution certified to meet the standard to an accuracy of ±0.01 pH removing the inaccuracies involved with mixing buffers.

Milwaukee solutions are designed to help you achieve reliable and repeatable pH measurements while extending the life of your electrode.