Helium tightness – product tightness tests

Tightness tests of objects can be carried out using various techniques. The choice of technique depends on the expected accuracy of the measurement or the magnitude of the leak – the most accurate leak testing technique is the use of a vacuum method with a mass detector. The test is carried out on an object filled with helium, at atmospheric or elevated pressure (up to 250 bar or more), placed in a vacuum chamber connected to a mass detector. The test can detect leaks of the order of 10-12 mbar*l/s. Using an additional sensor (a sniffer), it is possible to locate points/areas of leakage on the order of 10-7 mbar*l/s.


  • PHOENIX L500i helium leak detector (range from 1000 mbar*l/s do <5*10-12 mbar*l/s)
  • Haskel Ag-75 compressor, permitting helium pressures of over 400 bar to be created
  • Test chambers: 300x300x500 mm; 800x800x1000 mm


  • DIN 8964
  • DIN 74104
  • QV 64037
  • other product and industry norms

 See also: 

Document No. Title/Description
DIN 8964 Circuit elements for refrigerating systems - Part 2: Sealed systems; Requirements
DIN 74104 Road vehicles - R744-Air-conditioning systems - Condenser/gas cooler