Severinghaus Electrode

The Severinghaus Electrode is used to measure the carbon dioxide (CO2, pCO2), and has been employed to measure pCO2 in blood gas analysers.


The carbon dioxide dissolved through the polymer membrane. Upon diffusing through the membrane the carbon dioxide forms carbonic acid through an equilibrium with water, the subsequent dissociation of carbonic acid forms a pH change, which could be measured with ZP's hypervalue pH electrode. 


The change in pH is proportional to the carbon dioxide in the sample.