| abstract |
A composite laminated electrode diffusion medium for use with electrochemical cells, particularly of the type used to detect the proportionate amount of a gas in a fluid medium, includes an intermediate barrier membrane member of a gas permeable, nonconducting material flanked in sandwich fashion by gas permeable, non-conducting carrier membrane layers, wherein the outer layer carries a metal screen blocking member which reduces the amount of sample gas diffusing through the membrane and the inner layer carries the sensing electrode. |