Particulate Matter (PM) Sensors are devices that monitor the level of soot in the exhaust system in order to:
- Monitor the cleanliness/condition of Diesel Particulate Filter (DPF) and inform the ECU/user about the need for its regeneration or replacement
- Ensure compliance with emission standards
PM sensors communicate with the vehicle ECU via CAN, and output a linearized value based on the measured resistance between two platinum sensing electrodes. The on-board software manages the sensor regeneration and performs self-diagnostics, including checks for circuit faults and tampering.
Advantages:
- Single-layer alumina element for thermal shock resistance and excellent platinum adhesion
- Laser-cut electrodes for consistent and fast response, high sensitivity
- Integrated sensor-heater for efficient heating of the sensing surface during regeneration