The application of helium mass spectrometer leak detectors has expanded from scientific academies, colleges, laboratories, and a few scientific research institutions to industrial and mining enterprises, even township enterprises and individual enterprises. It can be said that the application fields are extremely broad.

1、 Application of Aerospace High tech Industry

(1) For example, rocket engines and attitude engines used to use pressure brush soap water for leak detection, but now the process has been improved to use helium mass spectrometer leak detection, combined with helium hood method, greatly improving the sensitivity of leak detection and ensuring engine quality. The leak detection of rocket body adopts a combination of several methods such as helium hood method and accumulation method. Due to the application of leak detection technology, the sensitivity of leak detection has been improved, making up for the shortcomings of low instrument sensitivity in suction leak detection.

(2) The KM6 space ring model device has a large equipment, with a main vacuum chamber diameter of 12m and a height of 22m, as well as auxiliary vacuum chambers and manned cabins. With a volume of 3500m3 and multiple subsystems, the structure is complex, and various interface welds add up to several kilometers long. A helium mass spectrometer leak detector is used for negative pressure leak detection. Each weld is sealed by a leak detection box, and an auxiliary pumping system is used to lower the vacuum inside the box. Then, a certain pressure of helium gas is filled, and the pre pumping valve is closed and the leak detection valve is opened. Due to the high helium concentration inside the box and a certain pressure relative to the leak detector, the leak detection sensitivity has been effectively improved.

(3) In the aerospace industry, helium mass spectrometer leak detectors and their leak detection technology are widely used in satellites, various valves, electronic components, sensors, and so on.

2、 Application in the power industry

SF6 high-voltage switches and zinc oxide lightning arresters are important components of power plants and field power transmission and transformation. They often cause large-scale or partial power outages due to leakage, affecting industrial production and hindering people's normal lives. The economic losses caused by this are sometimes difficult to estimate.

(1) High voltage switches are made of aluminum castings in the connecting box, which often have sand holes and complex leakage structures, making them difficult to clean. Generally, the leak detection box or helium hood method is used, which involves evacuating the inspected item, filling the hood with helium gas, and waiting for a certain period of time to determine the total leak rate. Due to the small amount of helium used, the detection sensitivity is high.

(2) Zinc oxide lightning arrester is a device that uses different cross-sectional areas, thicknesses, and quantities of zinc oxide sheets according to voltage requirements, installed in ceramic sleeves, filled with nitrogen gas, and sealed. Its working principle is that in the event of lightning strikes in high-voltage output, the resistance of the zinc oxide sheet decreases, causing a short circuit to ground due to high current and protecting the transmission line. If there is no pressure difference between the inside and outside due to leakage, external humid gases may enter and damage the characteristics of the zinc oxide sheet, causing an explosion.

(3) In the power industry, helium mass spectrometer leak detectors are also used for leak detection in power plants, high-voltage transformers, high-voltage capacitors, high-voltage switch tubes, and other components, using different methods for leak detection.

3、 Applications in the electronics industry

Microwave emitter tubes, electronic tubes, transistors, integrated circuits, sealed relays, various sensors, and pulse generators.

4、 Applications in the vacuum industry, instrument and meter industry

Pipelines, joints, valves, corrugated pipes, various vacuum pumps, exhaust units, electron microscopes, mass spectrometers, electron beam ion velocity exposure machines, laser axis separators, high-energy accelerators, medical accelerators, irradiation accelerators, coating machines, thin film vacuum gauges.

5、 Application of nuclear industry

Uranium separation device, storage device, nuclear power generation device.

6、 Application in the refrigeration industry

Refrigerator, air conditioner, lithium bromide refrigeration unit, automotive air conditioner, evaporator, condenser, condenser, low-temperature storage tank.

7、 Application of stainless steel insulated vessels

Vacuum insulated cups, bottles, pots, lunch boxes, etc.

8、 Other applications

According to relevant articles in Japan, more than 30 types of components in the Japanese automotive manufacturing industry are using helium mass spectrometer leak detectors to detect leaks and solve sealing problems. This includes hydraulic systems, braking systems, steering systems, suspension systems, and even car wheels. There are still many areas of leak detection that need to be explored, but due to the constraints of ideological concepts and funding, many fields still use ancient and relatively backward methods to deal with leak problems. The product qualification rate and production efficiency are low. In a sense, this way of working constrains the development of productivity.

Therefore, for vacuum professionals, especially those engaged in the development and production of vacuum equipment and helium mass spectrometer leak detectors, further efforts should be made to promote the application of helium mass spectrometer leak detectors, in order to promote the development of vacuum technology in China.