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?
现如今，业内主要有 4 种成熟可靠的气密性检测方法。本文将为您全面解析这 4 种气密性检测法的原理、优点缺点、使用场景及案例，全方位解读气密性测量技术的方方面面，以提升您对气密性检测的全面认知。

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

通过上文对 4 种气密性检测方法的解析，我们可以看到，不同的气密性检测技术各有优劣，没有一种方法可以完美兼顾全方位的测试需求。
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.

未来，JCGK 的测试技术将持续发展创新，检测设备向精密化方向演进。只有深入理解技术原理，才能制定最佳的检测方案。测试技术的进步也将促进产品质量和品牌形象的提升。