Construction
► The basic construction of the heated oxygen sensor and the air-fuel ratio sensor is the same. However, they are divided into the cup type and the planar type, according to the different types of heater construction that are used.
► The cup type sensor contains a sensor element that surrounds a heater.
► The planar type sensor uses alumina, which excels in heat conductivity and insulation, to integrate a sensor element with a heater, thus improving the warm-up performance of the sensor.
Alumina
Alumina
Atmospheric
Heater
Platinum Electrodes
Sensor Element (Zirconia)
Atmospheric
Heater
Platinum Electrodes
Sensor Element (Zirconia)
Heater
Platinum Electrodes Atmospheric
Platinum Electrodes Atmospheric
- Sensor Element (Zirconia)
271EG45
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Do It Yourself Car Diagnosis
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