Corrugated diaphragm is a thin shell elastomer diaphragm elastic sensitive element for circular membrane. When the two sides of the diaphragm (or power) by the pressure of different role, the diaphragm move to low pressure side of the strain, the center temperature and pressure difference into a certain relationship between the displacement..., because of its many parameters, and restraining each other, so that its design is very complex. In most of the displacement type instrument, corrugated diaphragm produce size and thickness of the diaphragm is at least the same order of magnitude of the elastic displacement.