Analysis of the two schools of air tightness testers: direct pressure and differential pressure, you need to understand the difference between them

Airtightness Tester作为关键的密封性防水测量工具，在许多行业中发挥着重要的作用。而在气密性检测领域中，Direct Pressure Airtightness Testercap (a poem)Differential Pressure Airtightness Testerare widely used and each has unique advantages. In this paper, we will make a comprehensive comparison of these two technology genres from three aspects: detection principle, usage scenarios, and performance performance to help users better understand the differences between them.

Ⅰ.Detection Principle

Direct Pressure Airtightness TesterAirtightness testing is performed by detecting changes in the absolute value of pressure at one end.However, this method is easily affected by environmental factors such as temperature and humidity. At the same time, structural parameters such as the volume of the product under test and the elastic properties of the material may also interfere with the test to some extent. These uncertain influences may make the test results produce certain fluctuation errors.

(indicates contrast)Differential Pressure Type Airtightness Tester通过在同一环境下同步测试被检产品和标准对照品，可以有效消除(排除)环境条件及被测产品本身结构引起的影响误差。The test end and the standard end are in the same temperature and humidity environment, facing the same pressure loading background, so that the detected differential pressure more directly reflects the product's airtightness difference, free from the influence of other interfering factors, which ensures a higher test precision and can provide more accurate test results.

II. Scenarios of use

Direct Pressure Airtightness TesterEasy and practical to operate, it is suitable for airtightness testing of common products. Due to its relatively low cost, it is widely used in production lines of various sizes and in batch testing.

For example, in the consumer electronics industry, direct pressure testers are used to test the airtightness and watertightness of products such as Bluetooth headsets, GPS watches, tablets and smartphones.

户外对讲机整机防水测试，使用仪器：JC-TC-50S 直压型气密仪

In comparison.Differential Pressure Airtightness TesterWith higher precision, it is suitable for airtightness testing of high-end precision products. Differential pressure testers have better repeatability and are able to meet the needs of scenarios with higher requirements for hermeticity.

For example, for water-cooling plate airtightness testing of new energy vehicles, theDifferential Pressure Airtightness TesterIt is a commonly used tool. As a key component, the water cooling plate needs to ensure its internal sealing to ensure the proper functioning of the cooling system.Differential Pressure Airtightness TesterThe pressure difference inside the water-cooled panels can be accurately measured to assess their airtightness and ensure product quality.

III. Performance

Direct Pressure Airtightness TesterAlthough it is inexpensive and easy to realize small batch testing, its testing accuracy is usually 1Pa, which is poor.

(indicates contrast)Differential Pressure Airtightness TesterThe test accuracy is as high as 0.1 Pa with good repeatability, making it suitable for high-volume precision testing needs.Differential Pressure Airtightness TesterRepresenting the high-end direction of technological development, its accurate test results make it widely recognized in demanding industries.

IV. Summary

Direct Pressure Airtightness Testercap (a poem)Differential Pressure Airtightness TesterEach has its own advantages and disadvantages, and should be selected according to specific product characteristics and testing requirements.

直压检测仪操作简单实用，适用于普通产品的测试；而差压检测仪具有更高的精度和重复性，适用于对高端精密产品的要求更高的气密性检测。

Differential Pressure Airtightness TesterBy eliminating the influence of temperature, humidity, product volume and structure, it can provide more accurate test results, and its test precision resolution can reach 0.1Pa, which meets the needs of products with high requirements for airtightness testing.

随着技术的不断进步，Airtightness Tester行业在未来将继续发展，JCGK 精诚工科也会不断创新，为各行各业提供更准确、可靠的气密性检测解决方案。