Patent ID: 6080294
Filing Date: 2000-06-27
Classification: G01N

Abstract:
A gas sensor for measurement of a gas in an environment comprising, in combination:a first electrode;a membrane permeable to the gas and impermeable to water vapor, positioned between the environment and the first electrode;a second electrode;a solid electrolyte positioned between the first electrode and the second electrode;a liquid electrolyte isolated from the gas to be measured, positioned between the first electrode and the second electrode, electrically serially connected to the solid electrolyte, and cooperating with the solid electrolyte in response to an electric current to produce a voltage between the first electrode and the second electrode, wherein the voltage changes in response to changes in the concentration of the gas wherein the second electrode is in direct contact with the liquid electrolyte; andmeans for electrical measurement of the voltage electrically connected to the first electrode and the second electrode.