How to choose the pressure gauge correctly? Measurement of different media and use environment to choose different pressure gauges
General media, such as air, water, steam, oil, etc., can be used ordinary pressure gauges. Special pressure gauge is needed for some media, such as ammonia with ammonia pressure gauge. Oxygen pressure gauge, (oxygen pressure gauge, nitrogen pressure gauge should be strictly prohibited oil, in case the table is stained with oil, syringe can be used to inject carbon tetrachloride into the spring tube; Clean before use).
For highly corrosive media, and corrosive gas environment, such as dilute hydrochloric acid, hydrochloric acid gas pressure side quantity, available stainless steel pressure gauge. But note that all stainless steel pressure gauges are not suitable for external corrosive media; Chlorine, nitric acid and perchlorinated oxygen and other fortifier environment. In addition, diaphragm pressure gauge can also be selected, diaphragm pressure gauge is the introduction of foreign advanced technology manufacturing, the main components of the diaphragm connecting body using QCr18Ni12M02Ti stainless steel material, and according to the requirements of the measured medium in its body filled with appropriate working fluid. (glycerol or silicone oil) diaphragm pressure gauge is widely used in petroleum, chemical industry, the use of indirect measurement structure, suitable for measuring viscosity, easy crystallization, corrosive, high temperature of liquid, gas or solid floating medium pressure. Isolation diaphragms are available in a variety of materials to accommodate a variety of different measuring media.
Have far preach is optional resistance when the required pressure gauge, far eastone resistance pressure gauge is suitable for measuring no explosion danger, crystallize, solidify and effect on copper and copper alloy non-corrosive media such as liquid, gas, and steam pressure, and can through the instrument set inside the synchronous resistive transmitter, will be pressure to transmit the power value to away from the measurement point on secondary instrument, To realize centralized detection and remote control; Should first choose electric contact pressure gauge or seismic electric contact pressure gauge, its USES magnetic help type electric contact device, possesses the advantages of stable and reliable action, joint power larger, especially seismic electric contact pressure gauge products on the basis of the electric contact pressure gauge, through setting damping device inside the pressure gauge, significantly improve the performance of resistance to medium pulse and mechanical vibration, It not only enhances the reliability of the product, but also prolongs the service life of the pressure gauge.
For micro pressure measurement can be selected, but the pressure gauge is only suitable for measuring copper and copper alloy non-corrosive gas or liquid medium small pressure. Explosion-proof type should be used if electric contact pressure gauges are needed in the environment with explosion-proof requirements. YN series vibration pressure gauge should be used for large vibration occasions.
