Forum Technical Discussions Helium leak detectors and port pressure Posted by: Alan , E-mail: Address, on May 13, 2008 at 13:30 : Hi, Is there a corrolation between the leak rate and the pressure you pump down a helium detector. example: two companies testing to the same spec 5x10-9 atm cc/sec. One uses a testport pressure of 0.4Pa, before applying helium, the other 100mTorr. (0.4Pa is a much stronger vacuum) Will the detection level/rate the same for fine/gross leaks on both systems? Should you specifiy a testport (max) pressure when specifying the leak rate? e.g. Must pass 5x10-9 atm cc/sec at X testport pressure Thanks in advance, Alan Follow Ups: Post a Followup: Name: E-Mail: Subject: Comments: ----------- Start Original Message ----------- : Hi, : Is there a corrolation between the leak rate and the pressure you pump down a helium detector. : example: two companies testing to the same spec 5x10-9 atm cc/sec. : One uses a testport pressure of 0.4Pa, before applying helium, the other 100mTorr. (0.4Pa is a much stronger vacuum) : Will the detection level/rate the same for fine/gross leaks on both systems? : Should you specifiy a testport (max) pressure when specifying the leak rate? e.g. Must pass 5x10-9 atm cc/sec at X testport pressure : Thanks in advance, : Alan ------------ End Original Message ------------ Optional Link URL: Example: "http://www....html". Alternative write "http://www.ndt.net/wshop/attach/filename.htm" if you transfered a filename.htm via FTP Page Title: is important! Optional Image URL: http://www....gif Attention! Please click the button only once. This may take a moment to process Forum Technical Discussions Help