| abstract |
SUMMARY OF THE INVENTION The present invention comprises: (i) a sealed chamber bounded, at least in part, by a carbon dioxide permeable membrane; (ii) having at least two electrodes in the chamber; The chamber contains a substantially electroless liquid adjoining the electrode and the membrane, the liquid comprising at least one metal ion or metalloid ion, and providing a physiological sensing device for carbon dioxide partial pressure (pCO2) measurement. |