Standardized against NIST standards, premixed, and ready to use. Pouch contains 7.00 pH water used as a calibration solution. "Singles" are convenient for high-precision calibration on-the-go.

All Oakton pH buffer solutions are freshness dated, and standardized against NIST-certified references to ensure quality. ±0.01 pH at 25°C.

Specifications

• Ideal for field calibration.
• NIST traceable materials.
• ±1% accuracy at 25°C.