High Accuracy (±0.01 pH): standardized against NIST certified pH references within 0.01 pH at 25°C (77°F). Ideal for the calibration of all kinds of pH meters
Color-coded, Double-sealed, 2-Year shelf life
Expiration date and Temperature/pH reference chart provided for reference
The 3M KCL Storage Solution helps keep the sensitivity and accuracy of your pH probes