Review: Classic Profile and TDS Meter

Classic Profile and TDS Meter

By: Hanna Instruments, Inc.

This comprehensive video provides an overview of pH testing, from the basics of pH to the parts of a pH measuring system. pH, or potential of hydrogen, is the hydrogen ion activity in a solution and is measured on a logarithmic scale of 0 to 14. It is important to note that pH readings are affected by temperature and that pH is a logarithmic scale, meaning small differences in readings can matter a lot.

The pH measuring system consists of an electrode, a special meter to display the pH value, and the sample solution. The electrode has a layer that is sensitive to hydrogen ion activity and an internal reference cell. The meter processes the voltage from the electrochemical cell and converts it to a meaningful measurement unit, pH.

When choosing a pH electrode, design considerations include the type and shape of glass, junction material, and body material. Additionally, it is important to consider the sampling points at which you will be testing, as different meters offer different features and accuracy.

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