Hamilton offers a complete range of patented pH / ORP buffer solutions and conductivity standards. These products are specifically designed for Hamilton sensors and feature high stability and industry leading shelf life.

Duracal ORP Buffers

Hamilton ORP buffers are stable for two years. You can always rely on them even if they have been used.

Duracal pH Buffers

Patented buffer solutions provide pH stability of up to five years. High buffering capacity provides rapid and stable calibration.

Conductivity Standards

Stability from 1 to 3 years respectively and conductivity ranges from 1.3 µS/cm to 100 mS/cm


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