Buffers are traceable and offer ±0.01 accuracy at 77 °F (25 °C). Pack of 20 pouches.

Five pouches each of pH 4, 7, and 10 buffers and rinse solution. All Oakton pH buffer solutions are manufactured under ISO 9000 quality guidelines and traceable to NIST standard (for meters with 0.01 resolution). A pH/temperature table is printed on the label for accurate calibrations.