Common structure and working principle of the gauge

Pressure gauge is often used in our daily life, the factory equipment, machinery used more commonly, but most people see it only the result of the work, but don't know what are its principle, composition and sensitive element, is to meet today: gauge principle: principle: the pressure gauge by sensitive element in the table ( Bourdon tubes, bellows, bellows) Elastic deformation, the pressure deformation by the transformation of movement in table to Pointers, cause the hands to display the pressure. Structure: the overflow hole, pointer, glass panels, pedestal, bourdon tube of several common pressure gauge, such as the sensitive element bourdon tube pressure gauge bourdon tube sensitive element is bent into a circular, elliptical section of c-shaped elastic tube. Measurement in wave tube of the inside of the medium pressure, bourdon tube elliptical cross section will be tending to circular cross section. Formed by tube small deformation, wavelengths, a certain ring stress. The ring stress can make the bourdon tube extends outward. As there is no fixed elastic bourdon tube head, it can produce small deformation, the deformation depends on the size of the measuring the pressure of medium size. Bourdon tube deformation through movement indirectly by pointer display measuring the pressure of medium. Bellows pressure gauge bellows sensitive element connected by two pieces of circular waves of diaphragm. Measuring cavity inside the membrane box, medium pressure deformation caused by the medium can be used to indirectly measure the pressure. The size of the pressure value showed by the pointer. Membrane pressure gauges are commonly used to measure gas pressure, and can measure micro pressure, over voltage protection to a certain extent, is also possible. When several bellows sensitive element fold together will produce larger to measure the pressure of the tiny heritability. The above is the introduction of pressure gauge, with pressure gauge, and more understanding?