Helium mass spectrometer leak detector principle

1. Structure of helium mass spectrometer leak detector (30D, 542, etc.)

2. mass spectrometry room

3. Vacuum system

4. Electrical System

5. How to select helium mass spectrometer leak detector

6. The content of air is very little.

7. Helium molecule is small, light and easy to pass through the leak. After entering the system, the flow and diffusion are also fast.

8. The helium ion mass-charge ratio is small, so the deflection radius is small, the size of the analyzer can be smaller, or the weak magnetic field can be used.

Helium mass spectrometer leak detector principle

1. The helium mass spectrometer leak detector is a kind of gas tightness detection instrument based on the principle of mass spectrometry, which uses helium as exploratory gas. The principle of mass spectrometry is as follows:

2. Electrons emitted by filament heat are accelerated into the ionization chamber, and collide with residual gas molecules and helium gas leaked into the ionization chamber to ionize them into positive ions. These ions enter the magnetic field under the accelerated electric field and deflect due to the action of magnetic field force (Lorentz force), forming a circular arc orbit.

Touch-screen-Helium-Mass-Spectrometer-Leak-Detector

Helium-Mass-Spectrometer-leak-detector-for-LNG

Helium-Mass-Spectrometer-leak-detector-for-battery