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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