Milwaukee pH Tester Calibration 4.01 Solution - Lot of 3 Our Berkey Sight Glass Spigot makes it easy to see the water level in your Berkey water ... The Travel and Big Berkey® use the 7.5" sight glass spigot. Replacement Reagents: Mi526-25 (25 tests)

Replacement Reagents: Mi526-25 (25 tests)

Model Number:1-03500-THRM

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Battery Type: 1 x 9V AA (included)

Milwaukee pH Tester Calibration 4.01 Solution - Lot of 3 Our Berkey Sight Glass Spigot makes it easy to see the water level in your Berkey water ... The Travel and Big Berkey® use the 7.5" sight glass spigot. Replacement Reagents: Mi526-25 (25 tests)DESCRIPTION M10004B 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 calibration solutions from powder. Sachet packaging means that you get fresh solution every time. Ideal for infrequent or field use. No risk of using expired calibration solution. Milwaukee solutions are designed to help you achieve reliable and repeatable pH measurements while extending