The Apera Instruments AI1108 pH Calibration Buffer Solution Kit includes two 8oz bottles of pH buffer solutions (pH 4.00 & pH 7.00), and one 4oz bottle of 3M KCL storage solution for pH/ORP electrodes. The color-coded buffer solutions are standardized against NIST certified pH references within 0.01 pH at 25°C (77°F). It's ideal for the calibration of all kinds of pH meters. Since pH level is affected by temperature, a temperature/pH reference chart is provided on the bottle label for reference. The 3M KCL Storage Solution helps keep the sensitivity and accuracy of your pH probes.

All the solutions are double-sealed, not subject to the DOT shipping restrictions, and have a 2-year shelf life. The expiration date is printed on the bottle. MSDS documents are downloadable.

Note: Store at room temperature and away from direct sunlight. Keep the bottle tightly closed when not in use. Keep out of reach of children.