PH electrode
Hach

The sension Gel-filled pH Electrode uses a silver/silver chloride reference element with a glass frit junction and a full-range pH glass that can be used in a wide variety of applications, especially at extreme levels of pH. If using the sension System, the meter will automatically account for buffer temperatures
during calibration and factor the information into the reported pH. The Auto Buffer Recognition/Auto Temperature Compensation calibration program built into sension meters contains accurate pH profiles for buffers of pH 4.01, 6.86, 7.00, and 10.01 at temperatures from 0 to 60 °C.