Helium mass spectrometer leak detector is a leak detection instrument that uses ammonia gas as the leak gas to locate, quantify, and qualitatively detect small leaks in vacuum equipment and sealing devices. It is a widely used leak detection instrument in vacuum leak detection technology, characterized by stable performance, high sensitivity, easy operation, and rapid detection. Its measurement working principle is as follows.

The helium mass spectrometer leak detector is a magnetic polarization transformation mass spectrometer made based on the principles of mass spectrometry. It is an airtight mass spectrometer leak detector made using ammonia gas as the leak detection gas. Its structure mainly consists of an injection system, ion source, mass analyzer, collection amplifier, cold cathode ionization vacuum gauge, etc. The ion source is gas ionization, forming a beam of ions with specific energy.

A mass analyzer is a uniform magnetic field space where different ions have different mass to charge ratios and move according to different orbital radii in the magnetic field to separate them. When set, only ammonia ions are allowed to fly out of the analyzer's gap and hit the collector. The collection amplifier collects the ammonia ion flow and sends it to the current amplifier. The leakage rate can be determined by measuring the ion flow. The cold cathode ionization vacuum gauge indicates the pressure in the mass spectrometry chamber and serves as a protective device.

In recent years, with the continuous development of high vacuum leak detection technology in the scientific field and the increasingly mature application technology, as well as the continuous innovation and progress of high vacuum leak detection instrument technology, instrument updates and replacements are very fast. There have been epoch-making advances in technical performance, high reliability, accuracy, durability, flexibility, and cost-effectiveness, which have gradually popularized high vacuum leak detection instruments from scientific research and laboratory applications to industrial and civilian applications.

Helium mass spectrometry leak detection technology is widely used in the field of vacuum leak detection technology. The advantages of this leak detection method are high sensitivity (can detect leaks up to the order of 10-12 Pa · m3/s), fast instrument response, easy operation, low cost, and wide applications. Therefore, helium mass spectrometry leak detectors are widely used in many fields.

The helium mass spectrometer leak detector technology can not only locate, qualitatively, and quantitatively leak in the field of vacuum leak detection, but also has the characteristics of easy operation, accuracy and reliability, low cost, and wide application. Using this leak detection technology can accurately, quickly, and effectively detect leaks from small items to large items, from small systems to large systems, from determining leak holes to determining leak rates. With the continuous development and maturity of helium mass spectrometry leak detection technology, it will gradually penetrate into various high-end and low-end industries in the future, and has broad application prospects. Therefore, it is worth promoting and applying.