Model Based Sensor System for Temperature Measurement in R744 Air   Conditioning Systems
  The goal is the development of a novel principle for the temperature acquisition of refrigerants in CO2 air conditioning systems. The new approach is based on measuring the temperature inside a pressure sensor, which is also needed in the system. On the basis of simulative investigations of different mounting conditions functional relations between measured and medium temperature will be derived. 
Sven Reitz, Andreas Schroth, Peter Schneider