Do you know the main structure and working principle of the pressure gauge?

Some factories or project requires a lot of instrumentation equipment, thermometer and pressure gauge is very common, in which pressure gauge is indispensable, today will give you introduce a pressure gauge of the main structure principle: pressure gauge of the main structure: first there is the pressure gauge of back tend to have explosion-proof plug. If produce bourdon tube burst of emergencies, internal pressure to release through the overflow hole to the outside world, to prevent the glass panel burst. When use in order to maintain the normal performance of the overflow hole, need to be at the back of the table to set aside at least 10 mm space, they cannot transform or overflow weir and explosion-proof structure. Pressure gauge pointer 2: in addition to the standard pointer, other pointer is optional, with various specifications and colors optional, according to use and easy to use. Glass panel 3: in addition to the standard glass, other special glass, such as tempered glass, reflective glass is optional. Performance classification: normal ( Standard) , steam with ordinary ( M） Type, heat resistant, H） , resistant to vibration mode ( V） , steam resistance to vibration mode ( MV） Heat resistant to vibration mode ( HV） 。 Treatment of other and shell, we also introduce. Abstain shell processing method: oil/water treatment during manufacturing to remove residues in the liquid of water or oil. Shell outside specified: in addition to the standard color, color should be specified. Throttle valve ( Optional) : some tables can choose to install throttle valve to control the work, in order to reduce the fluctuating pressure, throttle valve is installed in the entrance pressure. The working principle of pressure gauge, 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. The manufacture of the pressure gauge must choose qualified manufacturers, because of the pressure gauge belongs to the special instrument, we can't conveniently and pursue cheap, that might be the consequences of not worth the cost.