This standard specifies the graphical symbols, naming code method, basic parameters, technical requirements, test methods and inspection rules of pressure sensors. This standard applies to pressure sensors that convert pressure signals into electrical signals, including gauge pressure sensors, absolute pressure sensors, differential pressure sensors, and sealed standard pressure sensors. This standard also applies to differential pressure density sensors, pressure level sensors, etc. The technical requirements in this standard should be appropriately increased or decreased in each technical condition according to the different types of pressure sensors.