How to choose vacuum gauge correctly?

The original vacuum gauge was invented by a thin glass tube with mercury filled at one end of Torry. According to the vacuum range and the operating environment, the most commonly used vacuum meters are capacitance diaphragm vacuum meter, thermocouple vacuum meter, hot cathode ionization vacuum meter and cold cathode ionization vacuum meter.

These vacuum meters use different physical phenomena, among which the capacitance diaphragm vacuum meter uses force, thermocouple vacuum meter uses heat conduction, and ionization vacuum meter uses vacuum discharge.

The following points should be noted when vacuum timing is selected:

1： Whether the vacuum meter has enough measurement accuracy within the pressure range required by the equipment;

2： Whether the gas under test will damage the vacuum meter;

3： Whether the vacuum gauge will affect the vacuum environment under test;

4： Whether the pressure measured by vacuum gauge is full pressure or partial pressure, whether it has been calibrated or not is related to the gas type;

5： Whether the vacuum meter can realize continuous measurement, numerical indication and reaction time;

6： The stability, reliability and life of vacuum gauge.
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