초록 ▼

An electrochemical cell for use in gas detection includes a cell body having an electrolyte cavity and a separate sensor cavity. The sensor cavity holds stacked sensor elements including a counter electrode, electrolyte mat, reference electrode and sensing electrode. A wick draws the electrolyte fro

An electrochemical cell for use in gas detection includes a cell body having an electrolyte cavity and a separate sensor cavity. The sensor cavity holds stacked sensor elements including a counter electrode, electrolyte mat, reference electrode and sensing electrode. A wick draws the electrolyte from the electrolyte cavity to the electrolyte mat. The sensing electrode closes off the sensor cavity and seals the counter and reference electrodes therein. The only gas which contacts the counter and reference electrodes is that which passes through the sensing electrode or is generated by the counter electrode and becomes dissolved in the electrolyte.

대표청구항 ▼

An electrochemical cell for gas detection comprising an impervious nonconductive cell body having an electrolyte cavity and a separate sensor cavity formed therein, said electrolyte cavity being at least partially filled with a liquid electrolyte, said sensor cavity having a plurality of sensor elem

An electrochemical cell for gas detection comprising an impervious nonconductive cell body having an electrolyte cavity and a separate sensor cavity formed therein, said electrolyte cavity being at least partially filled with a liquid electrolyte, said sensor cavity having a plurality of sensor elements stacked therein including a counter electrode positioned at an inner end of said sensor cavity, a gas diffusion sensing electrode containing a catalytic material and positioned at an outer end of said sensor cavity and spaced from said counter electrode, an electrolyte mat positioned between and contacting said counter and sensing electrodes, and a reference electrode disposed within said electrolyte mat and spaced from said counter and sensing electrodes, said reference electrode formed of a non-porous, conductive material coated with a layer of a catalytic material, and with said counter electrode being a porous, hydrophilic, conductive structure containing a catalytic material, with said catalytic material of said sensing, counter and reference electrodes oxidizing or reducing a particular gas or particular gases coming in contact therewith, said sensing electrode closing off the outer end of said sensor cavity and sealing said counter electrode, reference electrode and electrolyte mat within said sensor cavity, said cell including wick means for wicking liquid electrolyte from said electrolyte cavity to said electrolyte mat, and including means for making electrical contact with said counter, reference and sensing electrodes, wherein said counter and reference electrodes are submerged within said sensor cavity by said sensing electrode and any gas contacting said counter and reference electrodes passes through said sensing electrode and is dissolved in said electrolyte.