How to choose a pressure sensor suitable for a specific environment?

Choosing a pressure sensor suitable for a specific environment is a complex process, which involves the comprehensive consideration of many factors. The following are some key steps to choose a suitable pressure sensor according to the application scenario and environmental conditions!

1. To determine the characteristics of the measuring medium, first of all, we must consider whether the sample has corroded parts after the quality of the measured substance. Viscosity or high temperature, etc. For dry corrosive substances, such as acid, alkali, salt solution, etc., pressure transmitters made of corrosion-resistant materials should be washed, such as sensors made of stainless steel 3161 and Hastelloy, and diaphragm pressure sensors are recommended for viscous media such as glue and paint syrup to prevent viscous substances from entering the internal shadow measurement accuracy. However, in the face of high mixing quality, such as furnaces and boilers with large pressure, the cloud should be resistant to high mixing pressure sensors.

2. Measurement range and accuracy requirements Next, we should consider the measurement standard and accuracy requirements. In the low-pressure measurement scene, such as small pressure change in vacuum coating process, a differential pressure sensor that can accurately measure several pa or even lower pressure should be selected. For the fluid pressure measurement of common industrial pipelines (such as urban water supply pipelines), the pressure is usually in the range of 0.MPa to IMPa, and the conventional pressure sensor fertilizer can meet the demand; however, in extreme conditions such as high-pressure hydraulic system or deep-sea pressure measurement, a sensor specially designed to withstand and accurately measure high pressure is needed. In addition, if the application places require high precision, such as the aerospace field, then it is necessary to select products with a precision level of 0.1% or higher.

3. Evaluation of working environment conditions The working environment is another important consideration. In dusty environments such as mines and construction sites, it is recommended to choose sensors with high protection level (such as IP65 and above) to ensure their dustproof and waterproof performance. If flammable and explosive gases exist, explosion-proof pressure sensors should be selected. 2. In addition, in places with frequent vibration, such as automobile engine test bench, priority should be given to those designs that can resist a certain level of vibration and impact. 4. Installation methods and space constraints.

Considering the different installation positions, there will be different connection methods to choose from, such as threaded connection or flange connection pressure sensor used in most standard piping systems; However, in some special locations, such as narrow spaces, a more compact design may be needed, such as the welded Wicca sleeve sensor 2. For small electronic equipment, because of the limited internal space, miniature pressure sensors are often chosen to meet these tight space requirements.

5. Signal output types and compatibility

Last but not least, it is necessary to confirm whether the signal output type of the first sensor meets the requirements of the subsequent processing equipment. If it is an analog control system, the traditional model that outputs 4-20mA current signal can be selected, while for modern factory automation systems with high degree of digital integration, it is more suitable for digital signal output supporting communication protocols such as SP1 and 12C. At the same time, it is necessary to ensure that the newly added pressure sensor has good compatibility with other existing components, including power supply specifications, communication interfaces and so on. To sum up, by carefully analyzing the above aspects and combining with the specific application background, you can find the most suitable pressure sensor solution for your project, which not only helps to improve the overall performance of the system, but also effectively reduces the maintenance cost and prolongs the service life of the equipment.

Life.