Describe the purpose and working principle of pressure gauge

Pressure gauge is elastic type pressure meter, and its structure principle: elastic pressure gauge by measuring system ( Including joint, elastic element and the transmission mechanism, etc. ) And instructions ( Including pointer and dial) And the shell ( Including casing, cover and table glass, etc. ) Composition, instrument has good sealing and sealing device, can protect the internal measurement institution from mechanical damage and filth from invading as well. The effect of elastic pressure gauge principle is based on elastic element ( Measurement system of the spring tube) Out of shape. Under the effect of pressure measured medium, the forced deformation elastic element ( Such as the end of the spring tube produced the corresponding elastic deformation) - Displacement, with the aid of connecting rod through the rotation of the gear rotating mechanism and to enlarge, will be fixed on the shaft of pointer will be gradually from the pressure on the dial indicator. Pressure gauge according to the elastic sensitive element is different, can be divided into: spring pipe, bellows, diaphragm and bellows type, etc. Most of what we usually common is spring tube.