Sensor Technology

NGK INSULATORS LTD. started the development of NOx sensor to be used in automotive and heavy duty diesel applications in 1993. In order to realise the NOx sensor concept, NGK used proven Thick Film ZrO2 Technology. NGK was the first manufacturer in the world to apply this technology in oxygen sensors starting in 1987. This technology has already been proven. The actual type of the Smart NOx sensor was developed in co-operation with Continental AG. NGK INSULATORS LTD. provides the NOx sensor, Continental AG provides the control electronics.

The SMART NOx SENSOR offers:

  • NOx trap or SCR catalyst control

  • Engine control.

  • NOx OBD

as potential applications for compliance of tighter emission regulations.

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Smart NOx Sensor
(Thick Film ZrO2 NOx Sensor with In-Connector Electronics)

Utilizing specialilzed ZRO2 thick film technology, NGK has developed a new NOx SENSOR which can be directly installed in exhaust gas stream of a combusion engine, and can measure NOx components with less interference effect of other gas components. A SMART NOx SENSOR is a stand a lone sensor for ECU, with an integrated in-connector control electronics.