The oxygen sensor uses a flat structure multilayer ceramic chip as the basic sensing element, and its working principle is equivalent to a simple solid galvanic cell. There will be an electrical voltage difference between the electrodes on two sides of the oxygen sensor due to the difference of oxygen ion concentration. As the outer electrode is exposed to the exhaust gas, the oxygen ion concentration will change according to the actual working conditions, while the inner electrode is the reference air, and the oxygen ion concentration is unchanged. When the air fuel ratio of the engine is lean, the oxygen ion concentration in the exhaust gas is relatively high, and the oxygen ion concentration difference between the inner and outer electrodes is small, and the sensor output voltage is low close to 0V; On the contrary, when the air-fuel ratio is rich, the oxygen ion concentration in the exhaust gas is relatively low, and the oxygen ion concentration difference between the inner and outer electrodes is large, and the sensor output voltage is high, close to 1V.

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Custom packaging can be provided to meet any need, please contact KESENS Engineering for details.