This paper describes development of the new pressure sensor. Significance of this approach and propose approaches for improving sensitivity, dimensions and accuracy. The main goal of the project is the research of complex smart pressure sensor based on the new sensing system with galvanic fiber optic isolation including research and experimental validation of this new pressure sensing principle. The objectives of the project of applied research are in new methods and technology of pressure sensors with galvanic isolation and function specimen of smart optical pressure sensor for explosive industrial environment and/or environment with high electromagnetic interference and very high precision and absolute resistance to electric and magnetic interference.