Testing apparatus for gas sensors

G - Physics – 01 – N

Patent

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Details

G01N 37/00 (2006.01) G01D 18/00 (2006.01) G01N 27/404 (2006.01) G01N 27/416 (2006.01) G01N 27/49 (2006.01) G01N 33/00 (2006.01)

Patent

CA 2238141

A gas sensor, (8) includes a body, (10) that is shaped to define a chamber (14). An electrolyte (34) is contained in the chamber (14) and three electrodes (26, 28 and 30) that are located on an electrode substrate (24) are disposed in contact with the electrolyte. The body, (10) is electrically connected to the three electrodes. A cover (36) engages the body (10) to enclose the chamber (14). A resistor array (58a-58n) is located between the cover (36) and the electrode substrate (24). The resistors (58a-58n) are coated with a compound that emits a predetermined gas in response to temperature increase. To test the sensor (8), voltage is selectively applied to the resistor array (58a-58n) to introduce the gas to the gas diffusion path of the sensor (8).

Un détecteur de gaz (8), comprend un corps (10) dont la forme définit une cavité (14). Un électrolyte (34) remplit cette cavité (14) et trois électrodes (26, 28 et 3) sont fixées sur un support d'électrode (24) au contact de l'électrolyte. Le corps (10) est électriquement raccordé à ces trois électrodes. Un couvercle (36) s'emboîte sur le corps (10) afin de clore la cavité (14). Une série de résistances (58a-58n) est disposée entre le couvercle (36) et le support d'électrode (24). Ces résistances (58a-58n) sont recouvertes d'un composé qui dégage un gaz prédéterminé en réponse à une élévation de température. Afin de contrôler le détecteur (8), une tension spécifique est appliquée à la série d'électrodes (58a-58n) afin de libérer le gaz dans le conduit de diffusion de gaz du détecteur (8).

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