Carbon Dioxide as a Refrigerant

Carbon dioxide, known as R744, is having a genuine comeback as a refrigerant in vehicle air conditioning, offering zero ozone depletion potential and strong refrigeration performance compared with older gases like R134a. The catch is the high pressure range and low critical temperature CO2 systems run at, which puts real demands on the sensors used to develop and validate them. DDM pressure sensors, distributed by Interface Force Measurements, are built for exactly this: a seal-less, wear-resistant diaphragm in 1.4435 stainless steel, a 1.4404 stainless housing, and a 100% helium leak test on every laser weld to guarantee integrity under CO2's high pressures. Tested extensively on both bench rigs and in real vehicles, these sensors give automotive engineers the long-term stability and precision needed as CO2-based climate systems move toward becoming the industry standard.