Air tightness tester: What are the main methods for air tightness testing of testing devices? PLUS Automation

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The main methods for air tightness testing of testing devices include the following:

1. Differential pressure method: By applying different pressures on both sides of the device under test, the pressure difference and leakage flow rate are measured to evaluate air tightness performance. Common differential pressure methods include the differential pressure method and the differential pressure change method.

2. Negative pressure method: A negative pressure environment is created inside the device under test, and the pressure change in the negative pressure environment is measured to evaluate air tightness performance. The negative pressure method is suitable for sealed systems or containers.

3. Tracer gas method: A traceable gas, such as helium, is charged into the device under test, and then the air tightness performance is evaluated by detecting the leakage of the gas. The tracer gas method is suitable for smaller leak points.

4. Bubble test: suitable for detecting larger leaks, such as cracks or holes. Immerse the device under test in water, apply pressure or negative pressure, and observe whether bubbles are generated to evaluate air tightness performance.

5. Vacuum method: A vacuum environment is created inside the device under test, and changes in the vacuum level are measured to evaluate air tightness performance. The vacuum method is suitable for sealed systems or containers.

    These methods can be selected according to different applications and requirements to evaluate the air tightness performance of the device under test. The specific method chosen depends on the characteristics of the device under test, the test requirements, and the available testing equipment and methods.

DeviceAir tightnessIt is an important factor in ensuring test success.