Principle of airtightness testing and leak detector

Release time:2024.12.19
Views:757
The test method is to press compressed air (or ammonia, fluorine, helium, halogen gas, etc.) into a container and check for leaks using the pressure difference between the gas inside and outside the container.
Airtightness testing requires an airtightness tester, which is a device specifically designed for testing the sealing of mechanical products in chambers. It is mainly used in the production of automotive engines, transmissions, axles, water tanks, fuel tanks, battery packs, etc. that require sealing of the chamber. The airtightness tester adopts an intelligent design with embedded control, which can automatically complete the testing program and automatically distinguish the inspection results.
 
A leak detector is a professional tool used to detect and locate leaks in equipment such as pipelines and storage tanks. Its main functions include discovering leaks, locating leak points, and quantitatively measuring the amount of leaks. The working principle of a leak detector usually involves using specific sensors or probes to detect gas or liquid leaks, and accurately locating the leak point through sound, cursor, or digital display. Different types of leak detectors may use different technologies, such as air pressure leak detectors that detect leaks through changes in air pressure, while other types of leak detectors may use electronic sensors or other physical principles.
 

 
The testing principle of Han's Laser leak detector
Direct pressure method: Using a pressure attenuation testing mode, when the product leaks, this leakage value is detected by the sensor.
 
Differential pressure method: Fill the testing end and the reference end with the same gas. When the product at the testing end leaks, a differential pressure will be generated between the testing end and the reference end, which can be detected by a differential pressure sensor.


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