TESTING APPARATUS FOR GAS SENSORS

摘要

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 a nd 30) that are located on an electrode substrate (24) are disposed in contact with the electrol yte. 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) a nd 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 sele ctively applied to the resistor array (58a-58n) to introduce the gas to the gas diffusion path of t he sensor (8).