The CPOS Series in–cylinder combustion sensor in production is Sensata’s piezo–resistive stand–alone combustion sensing technology to detect abnormal combustion on gasoline engines and help reduce raw emissions for diesels.

This specification describes the general functional, electrical and mechanical performance of a pressure sensor in production and intended to be used to sense combustion pressure inside an engine combustion chamber: the Cylinder Pressure Only Sensor, or CPOS. The CPOS consists of a micro-fused strain gauge (MSG), custom ASIC signal conditioning, and metal housing with integral connector. The sensor provides an analogue voltage, proportional to the applied pressure and supply voltage.