ELECTROCHEMICAL SENSOR HAVING IMPROVED RESPONSE TIME

摘要

The invention relates to a method and apparatus for providing an electrochemical gas sensor having improved response time for detecting a gas introduced into the sensor. The sensor includes a substrate having a first surface and a second surface and an electrode deposited on the first surface . The sensor also includes an ionomer membrane in contact with the first surfa ce and the electrode. The ionomer membrane has an opening in a location proxima te to the electrode for permitting gas introduced into the sensor to diffuse through the opening to simultaneously contact the electrode and the ionomer membrane within the opening. The substrate further includes at least one hol e extending from the first surface to the second surface for permitting moistu re to diffuse through the at least one hole to contact the ionomer membrane for enhancing sensitivity.