Can high-purity helium be used as a leak gas?

Helium, high-purity helium

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A high-purity helium mass spectrometer leak detector is a type of mass spectrometer that uses high-purity helium gas as the leak gas and uses a gas analyzer to detect leaks in high-purity helium gas. It is an advanced vacuum tank leak detection technology applied both domestically and internationally. Compared with conventional leak detection techniques, helium mass spectrometry leak detection technology has the advantages of speed, accuracy, high sensitivity, and no damage. The tracer gas of helium mass spectrometer leak detector can also be other elements. However, high-purity helium gas is usually used because it has the following characteristics:

1. The high-purity helium content in the air is very low, only about 1.2 million, which is easy to find;

2. High purity helium gas molecules are small, lightweight, easy to diffuse, and easier to pass through leakage holes than other gases;

3. The charge to mass ratio of high-purity helium ions is small, making it easy for mass spectrometry analysis;

4. High purity helium is non-toxic and odorless, and has no pollution to the atmosphere.

5. High purity helium gas is a chemically stable inert gas that will not corrode or damage equipment;

6. High purity helium is non-toxic, non condensable, and extremely difficult to store in water.

Due to the above characteristics of high-purity helium gas, research institutions have applied high-purity helium gas leak detection to high-purity enterprises and even individual enterprises. It can be said that the application fields are very extensive.