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Hydrogen and Helium Leak Detection Comparison |
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Hydrogen Leak Detector
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Leak Detection involving sniffing has traditionally used
helium as the preferred tracer gas. Helium was not extremely costly, had
a low background in atmosphere, was inert and could be detected with a
mass spectrometry leak detector. A mass spectrometer leak detector used
high vacuum. While helium could be pumped fairly well by vacuum pumps,
hydrogen proved very difficult to pump.
Mass spectrometer leak detectors were also high maintenance, leaving industrial users unsatisfied in that repair costs were too frequent and expensive. Other technologies have now been developed to get away from mass spectrometer leak detectors. The new helium leak detector does not use a high vacuum source but has a rough vacuum pump. The Sensistor using hydrogen as the tracer gas, evolved from technology used to find leaks in telecommunications cables underground. |
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