Electrochemical gas sensor with disk-shaped electrodes, which are also electrical contact leads
First Claim
1. An electrochemical gas sensor for detecting gaseous components in a gaseous environment with a disk-shaped measuring electrode, comprising:
- a pot-shaped sensor housing having a sealing edge;
a counterelectrode positioned within said sensor housing in electrical contact with said sensor housing;
a pot-shaped cover including a cover edge projecting over said pot-shaped sensor housing;
diffusion path means including an opening in said pot-shaped cover and a diffusion membrane;
a measuring electrode including a contact surface forming a part of an electrode surface of said measuring electrode, said measuring electrode being positioned between said cover and said housing;
a sealing ring positioned around said sealing edge of said pot-shaped sensor housing, said sealing ring establishing electrical insulation between said cover and said pot-shaped sensor housing upon a sealing clamping of said cover on said sealing edge;
an electrolyte filled electrolyte space including an electrolyte impregnated wick including a wick disk positioned between said cover and said housing in contact with an electrolyte-side surface of said measuring electrode;
said measuring electrode and said diffusion membrane each being formed as a disk and cooperating with a sealing disk and/or a pressing disk to form a disk stack, said wick disk being positioned adjacent an electrolyte side surface of said measuring electrode;
a compression spring supported between said wick disk and said pot-shaped sensor housing to press said disk stack, said cover edge being in contact with said contact surface of said measuring electrode to form a contact point.
1 Assignment
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Accused Products
Abstract
An electrochemical gas sensor for detecting gaseous components in the environment has a diffusion membrane, a measuring electrode, a counterelectrode, and, if desired, a reference electrode, pressed together in a disk stack, which are accommodated in a pot-shaped cover, which in turn is beaded around the sealing edge (6) of a housing pot (1). A compression spring (21) in the housing pot (1) presses a wick disk (20) against the measuring electrode (12), so that a constant and pressurized, intimate and sealed positioning of the disk stack is guaranteed. It is achieved as a result that no additional contact leads from the electrodes to the outer space of the sensor to the measuring and evaluating unit are needed, so that leakage-free sealing of the sensor to the outside is possible, and that a constantly stable, reproducible measured signal is obtained because of the defined and narrow electrolyte film on the surface of the measuring electrode.
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Citations
12 Claims
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1. An electrochemical gas sensor for detecting gaseous components in a gaseous environment with a disk-shaped measuring electrode, comprising:
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a pot-shaped sensor housing having a sealing edge; a counterelectrode positioned within said sensor housing in electrical contact with said sensor housing; a pot-shaped cover including a cover edge projecting over said pot-shaped sensor housing; diffusion path means including an opening in said pot-shaped cover and a diffusion membrane; a measuring electrode including a contact surface forming a part of an electrode surface of said measuring electrode, said measuring electrode being positioned between said cover and said housing; a sealing ring positioned around said sealing edge of said pot-shaped sensor housing, said sealing ring establishing electrical insulation between said cover and said pot-shaped sensor housing upon a sealing clamping of said cover on said sealing edge; an electrolyte filled electrolyte space including an electrolyte impregnated wick including a wick disk positioned between said cover and said housing in contact with an electrolyte-side surface of said measuring electrode; said measuring electrode and said diffusion membrane each being formed as a disk and cooperating with a sealing disk and/or a pressing disk to form a disk stack, said wick disk being positioned adjacent an electrolyte side surface of said measuring electrode; a compression spring supported between said wick disk and said pot-shaped sensor housing to press said disk stack, said cover edge being in contact with said contact surface of said measuring electrode to form a contact point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification