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- W2188510579 abstract "Helium is the most commonly used tracer gas for leak detection. However, it has a number of limitations in many industrial applications. The molecular weight of hydrogen is only half that of helium, and hydrogen has a much higher molecular velocity. As a result, hydrogen diffuses rapidly inside test objects, and dissipates far more quickly than helium. These properties, and the low price of hydrogen, make it a very attractive alternative. There are two main reasons why hydrogen is not already more commonly used than helium as a tracer gas: a) the perception that hydrogen is too dangerous and b) the availability of suitable hydrogen detectors. The flammability problem is easily solved by using a readily available standard mix of 5% hydrogen and 95% nitrogen, which is classified as non-flammable. The other obstacle was overcome by the introduction of a new type of hydrogen detector, based on microelectronic hydrogen sensors. These have high sensitivity and selectivity to hydrogen. Moreover, they are cost-effective and sufficiently robust for industrial applications, allowing leaks of 5x10 -7 mbarl/s to be detected using the 5% hydrogen mix. The use of hydrogen as a tracer gas is now increasing rapidly in the automotive, chemical, power generation, aerospace and telecommunications industries, among others." @default.
- W2188510579 created "2016-06-24" @default.
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- W2188510579 date "2006-01-01" @default.
- W2188510579 modified "2023-09-27" @default.
- W2188510579 title "Hydrogen as Tracer Gas for Leak Testing" @default.
- W2188510579 hasPublicationYear "2006" @default.
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