Airtightness testing methods turned out to be so many, the 4 mainstream test principle quickly understand the

Airtightness is directly related to the safe and reliable use of the product, so how to test the airtight waterproof performance of the product?
Nowadays, there are mainly 4 mature and reliable airtightness testing methods in the industry. This article will provide you with a comprehensive analysis of the principles, advantages and disadvantages of these 4 airtightness testing methods, the use of scenarios and cases, a comprehensive interpretation of all aspects of the airtightness measurement technology, in order to enhance your comprehensive knowledge of airtightness testing.

1️⃣ Water Inspection Act

This method is suitable for products that need to be tested for airtightness in a liquid environment, especially waterproof products.

2️⃣ Pressure decay methods

Also known as the pressure drop method, it is a commonly used airtightness testing method for different media.
In the pressure decay method, a certain pressure is first applied to the product or system to be tested and the initial pressure value is recorded. Then, the air or liquid supply source is turned off and the change in pressure is observed over a period of time. If the pressure in the system drops rapidly, there may be a leak or poor sealing performance. On the contrary, if the pressure of the system changes very little, it means that the product has a good airtight performance.

3️⃣ Gas Flow Detection Methods

This is a common method of airtightness testing, where the sealing performance of a product is evaluated by applying pressure and monitoring the pressure change. Pressure gauges or pressure transducers can be used to measure pressure changes to determine the airtightness of the product.

4️⃣ Helium Mass Spectrometry for Leak Detection

This method evaluates the gas-tightness of a product by applying a gas around the product or test sample and using a leak detector to detect gas leakage. Commonly used test gases include helium and nitrogen, among others.

✅ Summary

Through the analysis of the four airtightness testing methods above, we can see that different airtightness testing techniques have their own advantages and disadvantages, and no one method can perfectly take into account a full range of testing needs.
The water test method is simple and direct, gas leakage detection is accurate and reliable, and the pressure method can quantify the leakage rate. For different products, the purpose of testing is not the same.
Therefore, there is no one-size-fits-all testing technology, the only way to balance the testing requirements and economic benefits is to choose a single or a combination of technical solutions based on product characteristics. At the same time, different technologies can also complement each other to play a synergistic effect. For example, the water test first check the obvious defects, gas leak detection for detailed verification.

In the future, JCGK's testing technology will continue to develop and innovate, and testing equipment will evolve towards precision. Only through a deep understanding of the technical principles can we develop the best testing program. The advancement of testing technology will also promote product quality and brand image.