![]() On rare occasions, a certifiably pure gas can be used. Most tests use readily available Balloon Gas. or 1cc is approximately 1mbar litre per second. For reference 1 cubic millimetre per second is approximately 1×10 -3mbar.l.sec -1. There are 2 basic techniques high vacuum testing which allows leak test thresholds to be set down as low as 1×10 -12mbar.l.sec -1, or sniffing which is generally used for helium leaks down to 1×10 -6mbar.l.sec -1. This should result in a longer product life. Using this technique you can leak test to find smaller leaks than with other test processes, using a largely temperature independant, dry technique. What are the benefits of Helium Leak Testing? Helium leak testing can generally be between one thousand and one million times more sensitive than using pressure decay techniques. Although, it is also possible to use a residual gas analyser. In most helium leak testing applications, a mass spectrometer is used to detect helium. Being inert, helium is relatively safe to use (rather than hydrogen) and will not react with any of the materials within the part to be tested. Helium is one of the smallest gas molecules and is inert. This guide to helium leak testing should outline the basics of using this leak testing method. The helium is used as a tracer gas and its concentration is measured. Helium leak testing is used to find small leaks or larger leaks in bigger volumes. Guide to the Fundamentals of Helium Leak Testing What is helium leak testing? ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |