vacuum gauges types
CIXIFM is a professional vacuum gauge manufacturer that can provide many types of precision vacuum gauges. There are also many types. Today I will introduce the types of vacuum gauges to you.
There are many types of vacuum gauges, which can be divided into different types according to different classification standards.
According to the different physical mechanisms utilized by the measurement principles, vacuum gauges can be divided into the following three categories:
Utilize mechanical properties: such as Bourdon gauge and film capacitance gauge. Among them, the Bourdon gauge is a vacuum gauge that uses the stretching phenomenon of
a thin copper tube under the action of gas pressure to measure air pressure. Its measurement range is generally from 100Pa to 1atm. The film capacitance rule is to infer changes
in air pressure by measuring the capacitance changes caused by the deformation of the metal diaphragm under different pressures. The advantage of this gauge is that it is highly sensitive.
Utilize gas dynamic effects: such as Pirani resistance gauges and thermocouple gauges. Pirani resistance gauges, also known as thermal resistance vacuum gauges, work on the
principle of the relationship between resistance and temperature.
Utilize charged particle effects: such as hot cathode ionization gauges and cold cathode ionization gauges. The hot cathode ionization gauge is a vacuum gauge that uses hot electrons
to ionize gas molecules in a vacuum, and then indirectly measures the degree of vacuum by measuring the ion current generated.
In addition, according to the scope of use, vacuum gauges can be divided into absolute vacuum gauges and relative vacuum gauges. The absolute vacuum gauge is a vacuum gauge
that uses the force of the "wall" or "membrane" to produce displacement changes to indicate pressure. Relative vacuum gauges use heat conduction or ionization phenomena to indirectly measure vacuum.
In addition, there are some other types of vacuum gauges, such as static liquid level vacuum gauges, elastic element vacuum gauges, thermal conductive vacuum gauges, thermal
radiation vacuum gauges, discharge tube indicators, and viscous vacuum gauges.
In short, different types of vacuum gauges have differences in principles and characteristics, so you need to choose the appropriate type according to your needs for specific applications.
If you are currently looking for a suitable vacuum gauge
pirani vacuum gauge and don’t know how to choose,
please feel free to consult CIXIFM winny: