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      What is automatic temperature compensation?

      Automatic temperature compensation, also known as ATC, helps to compensate for the variance that is introduced by temperature fluctuations when taking a pH measurement.

      pH is a measurement of hydrogen ion activity, and temperature affects the ion activity. This relationship is explained by the Nernst equation.

      Note: Nernst Equation: 0.03pH per 10°C per unit of pH away from pH 7. 

      It is because of this relationship between pH and temperature that automatic temperature compensation (ATC) becomes more and more vital:

      1. The further away your measurement temperature is from 25°C.
      2. The further away your sample pH is from pH 7.