Sources of pH Measurement Error

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pH Sensors are electrochemical devices with limited lifespans. Changing process conditions directly impact each component within the combination electrode thus can be sources of error leading to inaccuracy and eventual death of the sensor.

The articles below review the impacts of temperature, coatings, liquid chemistry, and simple aging due to sensor usage.

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The Diffusion Potential of a pH Sensor
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Liquid Junction Contamination
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Alkaline Error
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Acid Error in pH Measurement
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Temperature Influence and Temperature Compensation
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The Aging of a Measurement Electrode
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The Aging of the Reference Electrode
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