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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.
An airborne engine drives the generator, supplied by a 100-gallon diesel fuel tank. Beginning in the late 1990s, the aerostat sites were equipped with Lockheed Martin 420K aerostats. This version carries the Lockheed Martin L-88, a surveillance radar with a range of 370 km (200 nm), as its primary payload.
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An HID connected to a gas chromatograph (GC) has the great advantage to use helium as both the carrier gas and the ionization gas. An HID is an ion detector which uses a radioactive source, typically β-emitters, to create metastable helium species. [1] The radioactive source ionizes helium atoms by bombarding them with emissions.
The primary purpose of leak detection systems (LDS) is to help pipeline controllers to detect and localize leaks. LDS provide alarms and display other related data to the pipeline controllers to assist decision-making. Pipeline leak detection systems can also enhance productivity and system reliability thanks to reduced downtime and inspection ...
The spacecraft and crew safely reach their destination after NASA and Boeing discovered additional helium leaks and thruster issues.
A SpaceX capsule carrying four private citizens will have to wait to launch into space after a helium leak forced a launch delay until later this week at the earliest.
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