For strong corrosive medium and corrosive gas environment, such as dilute hydrochloric acid and hydrochloric acid gas pressure, the stainless steel pressure gauge can be used. However, it is important to note that all stainless steel pressure gauges are not applicable to external corrosive media. Chlorine, nitric acid and chlorinated oxygen and other fortifier environment. It also can choose the diaphragm pressure gauges, diaphragm pressure gauge is the introduction of foreign advanced technology manufacturing, diaphragm connection of main components adopt Qcr18Ni12M02Ti stainless steel body, and according to the requirement of the measured medium filling in the appropriate working liquid in the body. (glycerin or silicone oil), diaphragm pressure gauges are widely used in petroleum, chemical industry its structure of indirect measurement, suitable for measuring the viscosity, easy to crystallization, corrosive, high temperature of the liquid, gas or solid suspended matter medium pressure. The diaphragm has a variety of materials to suit various measuring media.