5.2.2 Test methods
A distinction is made between two methods of leak detection:
- Local leak detection, which is used to find leaks
- Integral leak detection, where the leakage rate of workpieces is typically determined for quality assurance purposes
Leak detectors are equipped for two operating methods:
- The pump-down method, in which the workpiece is evacuated and helium exerts its effect from the outside
- The sniffer method, in which the workpiece is filled with a helium overpressure Δp of more than 100 mbar, and the escaping helium is sucked into the leak detector via a sniffer valve (capillary, metering valve) and detected
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Pfeiffer Vacuum GmbH
Berliner Strasse 43
35614 Asslar
Germany
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Pfeiffer Vacuum GmbH
Berliner Strasse 43
35614 Asslar
Germany
T +49 6441 802-0
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