Pressure sensors, refers to the membrane device (stainless steel diaphragm, silicone diaphragm, etc. ) as a medium, using pressure-sensitive components of the gas and liquid pressure measured and converted into electrical signal output device. Are widely used in various industrial automation environment, related to water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemical, oil, electric power, shipbuilding, machine tools, plumbing and many other industries.