How does the shock-resistant pressure gauge complete the testing work?
Users who often use shock-resistant pressure gauges should know that its detection effect is very accurate. Everyone is more interested in its technology, because it really brings a lot of benefits to users. Next, let's take a look at how the seismic pressure gauge completes the testing work. The following is the specific content:
To a certain extent, the shock-resistant pressure gauge adopts direct contact joints and pressure-sensitive component materials, using icr18Ni9T, Ocr18Ni12Mo2Ti, and sus316. The structure is a fully sealed type. The shock-resistant pressure gauge has a strong ability to resist corrosion of the measured medium and environmental corrosion. Vibration-resistant pressure gauges are suitable for highly corrosive media suitable for the detection of stainless steel components and harsh external corrosive environments. Vibration-resistant pressure gauges are widely used in petroleum, chemical, metallurgical and other industries.
Measuring method of seismic pressure gauge
The humidity measurement technology of shock-resistant pressure gauges has a long history. With the development of electronic technology, modern measurement technology has also developed rapidly. Humidity measurement is divided into as many as 20 to 30 in principle. The expression methods of humidity include humidity, relative humidity, dew point, the ratio of moisture to dry gas (weight or volume) and so on. But humidity measurement has always been one of the difficult problems in the world of metrology. A seemingly simple measurement value, when studied in depth, involves quite complex physical-chemical theoretical analysis and calculations. The first person may ignore many factors that must be paid attention to in humidity measurement, thus affecting its reasonable use.
Common humidity measurement methods are: dynamic method (double pressure method, double temperature method, shunt method), static method (saturated salt method, sulfuric acid method), dew point method, dry and wet bulb method and various electronic sensor methods.
Here, the double pressure method and the double temperature method are based on the thermodynamics P, V, T balance principle, the balance time is longer, and the split method is based on the mixing of moisture and dry air. Due to the modern measurement and control methods, these equipment can be made quite precise, but because the equipment is complex, expensive, and time-consuming and labor-intensive, it is mainly used for standard measurement, and its measurement accuracy can reach ±2%RH-±1.5%RH.
The saturated salt method in the static method is a common method in humidity measurement and is simple and easy to implement. However, the saturated salt method has strict requirements on the balance of liquid and gas phases, and higher requirements on the stability of the ambient temperature. To use it requires a long time to balance, and the low humidity point requires a longer time. Especially when the difference between the indoor humidity and the humidity in the bottle is large, it needs to be balanced for 6 to 8 hours each time it is turned on.
The dew point method measures the temperature when the humid air reaches saturation, which is a direct result of thermodynamics, with high accuracy and wide measurement range. The accuracy of the precision dew point meter used for measurement can reach ±0.2℃ or even higher. However, the chilled mirror dew point meter using modern photo-electric principles is expensive, and is often used in conjunction with a standard humidity generator.
The wet and dry bulb method is an indirect method. It uses the wet and dry bulb equation to convert the humidity value, and this equation is conditional: that is, the wind speed near the wet bulb must reach 2.5m/s or more. The common dry and wet bulb thermometer simplifies this condition, so its accuracy is only 5~7%RH, which is significantly lower than that of the electronic humidity sensor. Obviously, the wet and dry bulb does not belong to the static method. Don't simply think that as long as the measurement accuracy of the two thermometers is improved, the measurement accuracy of the hygrometer is improved.
