Sniffing Location Testing
This is the manual version of the Inside-Out test. The part to be tested is pressurized with trace gas but is then 'sniffed' using a sniffer wand on a leak detector rather than being placed within a vacuum chamber for a total go-no-go 'sniff' test.
As the probe passes a leak, escaping (Inside-Out) trace gas is collected by the sniffer wand and detected by the leak detector. The location of the leak site is pinpointed in this way. The success of this technique is dependant upon the skill of the operator as probe speed and position are critical. It is usually reserved for small components or as a repair technique for pinpointing leaks in assemblies that have failed a general Inside-Out test.
