Functional principle helium accumulation method
Testing medium: Helium
Detectable leakage rates: >0.001 cc/min
Method:
Test specimen is pressurized. Through leakages test gas emerges into a chamber enclosing the test specimen. The test gas is homogenized by a fan. Thru extraction of a gas sample the helium concentration is determined. After calibration with a test leak the overall leakage rate can be determined quantitatively.
Advantages:
Drawbacks: