AUTH and the Laboratory of Applied Thermodynamics (PI Prof. L. Ntziachristos) is a university partner with state-of-the art understanding of aerosol science and particle technology, which is of paramount importance to understand the theory behind the application of the new concept in environmental measurements. In parallel, it supports the European Commission in the development of On Board Diagnostics (OBD) sensors for exhaust PM control and has accumulated expertise into practical sensor development and requirements.