| 摘要 |
A galvanic-cell gas sensor includes casings containing a diaphragm permitting the permeation of gas to be detected but having a water-repelling property, a cathode provided on the back side of the diaphragm, an anode formed by electrolytically coating a layer of lead (Pb) on an electrically conductive material having a corrosion resistance to electrolyte so as to leave a portion thereof uncoated to serve as a lead, and a sheet impregnated with electrolyte before assembly and disposed between the cathode and anode, with the diaphragm positioned so as to be exposed to the atmosphere.
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