Lab grade pH 4.01 buffer solution certified to meet the standard accuracy of ±0.01 pH. This solution will help you acheive repeatable reliable measurements while extending the life of your electrode.

• Bottle Size: 230 mL
• Reliable Readings: Use solution to calibrate test tools for reliable pH testing
• To Use: Pour solution into a beaker and insert the tester or electrode to start the calibration process
• Frequency: Perform a calibration test once a month

Milwaukee’s line of calibration buffers have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened 500 mL bottle.