Welcome to the METTLER TOLEDO pH Electrode Troubleshooting Guide

The electrode is the key to successful analysis. Since the electrode is the only part of the analytical instrument that is in direct contact with the sample, its selection and maintenance has the strongest influence on precise and accurate measurements. However, a pH electrode that has been correctly selected and that has been working properly may nevertheless suddenly start performing badly. In this 'pH TroubleShooter' we will help you to identify possible reasons for this and suggest a number of procedures for restoring the electrode to its original performance.