Helium Leak Testing Service by Alfa Technovac Llp

Types of leak testing:

• Vacuum testing is done by connecting the test object to the leak detector, evacuating the object then spraying helium around the object. If a leak is present helium will enter the leak and show as an indication on the leak detector. Typically used on items such as bellows, electronic tubes and vacuum chambers or systems
• Pressure testing (sniffing) is done by pressurizing the internal volume of the object to be tested. The object is then examined for leaks with a "sniffer" probe connected to the leak detector. If a leak is present helium will enter the "sniffer" probe and show as an indication on the leak detector
• Combination pressure / vacuum testing: In this test method, the test object is pressurized or "backfilled" with helium and placed inside a chamber which is connected to the leak detector. If a leak is present helium will flow out of the object into the evacuated chamber and show as an indication on the leak detector. This type of testing is typically used for hermetically sealed components such as electronic devices, sealed relays and feed-throughs