GAS DENSITY DETECTOR AND FUEL CELL SYSTEM USING THE DETECTOR

摘要

A gas density detector capable of being easily mounted on a fuel cell system, measuring a gas density without relying upon a gas flow, being refreshed also against high density carbon monoxide gas, and eliminating an abrupt change of output current, comprising an electrolyte film having hydrogen ion conductivity, a detection electrode with a first catalyst coming into contact with one face of the electrolytic film, an opposed electrode with a second catalyst coming into contact with the other face thereof, a first collector forming a first flow passage having a first opening part opening only to a first recessed part and communicating with the first recessed part and having a face coming into contact with the detection electrode, and a second collector forming a second flow passage having a second recessed part and a second opening part communicating with the second recessed part and having a face coming into contact with the opposed electrode.