Instrument selection|Pressure transmitter selection Guide——Working Environment

There maybe high temperature, low temperature, humidity, corrosion, and other conditions in the working environment, which will require the material and sealing performance of the pressure transmitter. Therefore, when selecting a pressure transmitter, it is necessary to select the appropriate sealing material and protection level according to the actual application environment to ensure the pressure transmitter can work normally and has a long life.

1、Ambient temperature and pressure: In chemical, oil, natural gas, water treatment, and other industries, high-temperature pressure transmitters need to be able to withstand high temperatures, high pressure, and other harsh environments. These environmental factors directly affect the performance and life of the transmitter, so it is necessary to choose a high-pressure pressure transmitter that can adapt to a specific ambient temperature and pressure range. In chemical, oil, natural gas, water treatment, and other industries, we usually choose a high-temperature pressure transmitter or a high-pressure pressure transmitter.‌

2、Medium characteristics: the physical and chemical properties and states of the measured medium, such as strong acid, strong alkali, viscous, easy solidification, crystallization, and vaporization, will affect the selection of the Corrosion-resistant pressure transmitter. For example, viscous liquids, and slurries may block the pressure interface, and solvents or corrosive substances may destroy materials in the Corrosion-resistant pressure transmitter that come into direct contact with these media. These factors will determine whether to choose a direct isolation film and a material in direct contact with the medium. In strong acid, strong alkali, viscous, easy solidification, crystallization, and vaporization, we usually choose a Corrosion-resistant pressure transmitter and so on.‌

3、Environmental atmosphere: If the environment facing the measuring instrument is hot (toxic) and explosive dangerous atmosphere, is also a factor to consider when choosing a Explosion-proof pressure transmitter. Some environments may require the selection of Explosion-proof transmitters with explosion-proof features to ensure safety. In hot (toxic) and explosive dangerous atmosphere, we usually choose a well-sealed pressure transmitter or an Explosion-proof pressure transmitter.‌

4、Changes in operating conditions: Taking into account changes in operating conditions, such as changes in medium temperature, pressure, and concentration, as well as changes in gas phase and liquid phase concentration and density from the start of the car to when the parameters reach normal production, it is necessary to choose a transmitter that can adapt to these changes. In changes in medium temperature, pressure, and concentration, as well as changes in gas phase and liquid phase concentration, we usually choose a pressure transmitter with a strong ability to adapt to environmental changes.‌

        In summary, when selecting a pressure transmitter 4-20mA(https://youtu.be/Mjo9f5fgh8w), high-temperature pressure transmitter should be considered according to the specific characteristics of the use of the environment, including temperature, pressure, medium characteristics, environmental atmosphere, and changes in operating conditions, to ensure that the selected high-temperature pressure transmitter can adapt to the specific working environment, provide accurate and reliable measurement data, and has good durability and safety.