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Helium is used as a tracer because it penetrates small leaks rapidly. Helium also has the properties of being non-toxic, chemically inert and present in the atmosphere only in minute quantities (5 ppm). Typically a helium leak detector will be used to measure leaks in the range of 10 −5 to 10 −12 Pa·m 3 ·s −1.
A tracer-gas leak testing method is a nondestructive testing method that detects gas leaks. A variety of methods with different sensitivities exist. Tracer-gas leak testing is used in the petrochemical industry, the automotive industry, the construction industry [1] and in the manufacture of semiconductors, among other uses.
The helium leak test uses helium (the lightest inert gas) as a tracer gas and detects it in concentrations as small as one part in 10 million. The helium is selected primarily because it penetrates small leaks readily, is inert and will not react with the test piece while having a naturally low quantity in air making detection less complicated.
A leak appearing within an analytic region (a rule added to the camera) is immediately analyzed for its attributes, including thermal temperature, size, and behaviour (e.g. spraying, pooling, spilling). When a leak is determined to be valid based on set parameters, an alarm notification with leak video is generated and sent to a monitoring station.
The Canada-based Pulsar said Thursday 11 samples sent to a pair of labs measured helium contents of up to 13.8%, far above what CEO Tom Abraham-James said is a 0.3% threshold for when helium ...
During the final hour of their approach to the space station, Starliner’s crew began to manually pilot the spacecraft in a planned test of Starliner’s manual flight control capability.
The launch was expected on May 17 after a previous delay, but teams found a small helium leak in the service module of the spacecraft, according to a release from Boeing. Starliner teams traced ...
Download as PDF; Printable version; ... move to sidebar hide. Leak detector may refer to: Leak noise correlator; Helium mass spectrometer; Water detector; Gas ...