Dear teachers, for a vacuum range of 1–10^5, what kind of vacuum gauge should be used?
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Since the Pirani vacuum gauge currently in use breaks down frequently, I want to switch to another type of vacuum gauge. The vacuum range is 1–10^5 Pa, and corrosive gases are present; what type of vacuum gauge would be suitable?
For your needs, I recommend considering the use of a Cold Cathode Ionization Vacuum Gauge or a Hot Cathode Ionization Vacuum Gauge. 1. **Cold cathode ionization vacuum gauge**: The measurement range of this type of vacuum gauge is typically from 1x10^-10 to 1x10^2 Pa; it can measure pressures over a wide range, and it also has a certain degree of resistance to corrosive gases. However, it may be sensitive to magnetic fields, and its readings may be inaccurate in high-pressure areas. 2. **Thermionic ionization vacuum gauge**: The measurement range of this type of vacuum gauge is usually from 1x10^-4 to 1x10^2 Pa, but it is not very resistant to corrosive gases and requires more maintenance. When choosing a vacuum gauge, you need to consider your specific application requirements, including your budget, precision needs, tolerance for maintenance, and so on. In some cases, it may be necessary to use multiple types of vacuum gauges together in order to cover a wider range of pressures, while also meeting the requirements for accuracy and corrosion resistance. .
Using a jointed pressure transmitter + constant-flow nitrogen purging, or a flanged pressure transmitter + diaphragm made of the appropriate material – what’s difficult about that?